(1) a key/sensitive/controversial issue
(2) This is a big issue ; we need more time to think about it.
(3) She usually writes about environmental issues.

(1) There was an echo on the line and I couldn't hear clearly.
(2) The hills sent back a faint echo.
(3) the echo of footsteps running down the corridor

(1) He is charged with taking a car without the owner's consent .
(2) She was chosen as leader by common consent (= everyone agreed to the choice) .
(3) By mutual consent they didn't go out (= they both agreed not to) .

(1) I wish my mother would stop interfering and let me make my own decisions.
(2) The police are very unwilling to interfere in family problems.
(3) She never allows her personal feelings to interfere with her work.

(1) our ultimate goal/aim/objective/target
(2) We will accept ultimate responsibility for whatever happens.
(3) The ultimate decision lies with the parents.

(1) a prominent politician
(2) He played a prominent part in the campaign.
(3) She was prominent in the fashion industry.

(1) If I don't get more money I'll quit.
(2) He has decided to quit as manager of the team.
(3) He quit the show last year because of bad health.

(1) the flu virus
(2) a virus infection
(3) There's a virus going around the office.

(1) to tie a knot
(2) Tie the two ropes together with a knot.
(3) (figurative)hair full of knots and tangles (= twisted in a way that is difficult to comb )

(1) It's extraordinary that he managed to sleep through the party.
(2) What an extraordinary thing to say!
(3) an extraordinary achievement

(1) She received private tuition in French.
(2) The courses will give the beginner personal tuition in all types of outdoor photography.
(3) Angela's $7,000 tuition at University this year will be paid for with scholarships.

(1) The experiment went horribly wrong.
(2) It was horribly painful.
(3) What a horrible thing to say!

(1) The painting is insured for $1 million.
(2) Luckily he had insured himself against long-term illness.
(3) (figurative)Having a lot of children is a way of insuring themselves against loneliness in old age.

(1) (old-fashioned)She made haste to open the door.
(2) After his first wife died, he married again with almost indecent haste.
(3) The letter had clearly been written in haste .

(1) a war/security/demilitarized, etc. zone
(2) an earthquake/danger, etc. zone
(3) a pedestrian zone (= where vehicles may not go)

(1) She denies neglecting her baby.
(2) The buildings had been neglected for years.
(3) Dance has been neglected by television.

(1) Several avenues are open to us.
(2) We will explore every avenue until we find an answer.
(3) a hotel on Fifth avenue

(1) the treaty of Rome
(2) a peace treaty
(3) to draw up/sign/ratify a treaty

(1) You will be liable for any damage caused.
(2) The court ruled he could not be held personally liable for his wife's debts.
(3) We're all liable to make mistakes when we're tired.

(1) navigation systems
(2) an expert in navigation
(3) the right of navigation through international waters

(1) artificial/chemical fertilizers
(2) ...farming without any purchased chemical, fertilizer or pesticide...
(3) Work in a balanced fertiliser before planting.

(1) Women tend to live longer than men.
(2) When I'm tired, I tend to make mistakes.
(3) It tends to get very cold here in the winter.

(1) stable prices
(2) a stable relationship
(3) This ladder doesn't seem very stable.

(1) lifting/towing/winding, etc. gear
(2) (British English)The party organization is moving into top gear as the election approaches.
(3) (North Amercian English)to move into high gear

(1) She wandered aimlessly around the streets.
(2) We wandered back towards the car.
(3) The child was found wandering the streets alone.

(1) Surgeons have successfully transplanted a liver into a four-year-old boy.
(2) Patients often reject transplanted organs.
(3) Japanese production methods have been transplanted into some British factories.

(1) I was dropping with fatigue and could not keep my eyes open.
(2) battle fatigue
(3) The wing of the plane showed signs of metal fatigue .

(1) I fill up the tank with gasoline about once a week.
(2) leaded/unleaded gasoline
(3) For the same blending system, the penetration rates for acetic ether , absolute alcohol and gasoline sequence.

(1) The principal reason for this omission is lack of time.
(2) New roads will link the principal cities of the area.
(3) Peter Brown, principal of St John's college

(1) the Arctic/tropical/desert, etc. regions
(2) one of the most densely populated regions of North America
(3) the Basque region of Spain

(1) My legs were trembling with fear.
(2) Her voice trembled with excitement.
(3) He opened the letter with trembling hands.

(1) The wind had snapped the tree in two.
(2) He snapped a twig off a bush.
(3) Suddenly, the rope snapped.

(1) to have a vague impression/memory/recollection of sth
(2) They had only a vague idea where the place was.
(3) She's a little vague about her plans for next year.

(1) a naked body
(2) naked shoulders
(3) They often wandered around the house stark naked (= completely naked) .

(1) A comparable house in the south of the city would cost twice as much.
(2) The situation in the US is not directly comparable to that in the UK.
(3) Inflation is now at a rate comparable with that in other European countries.

(1) This data was collected from 69 countries.
(2) the analysis/interpretation of the data
(3) raw data (= that has not been analysed)

(1) Olympic glory in the 100 metres
(2) I do all the work and he gets all the glory.
(3) She wanted to enjoy her moment of glory.

(1) an art/a picture gallery
(2) the National gallery
(3) Relatives of the victim watched from the public gallery as the murder charge was read out in court.

(1) The hills were shrouded in mist .
(2) Early morning mist patches will soon clear.
(3) The origins of the story are lost in the mists of time (= forgotten because it happened such a long time ago) .

(1) a severe handicap
(2) His injuries are severe.
(3) severe weather conditions