(1) a mass of snow and rocks falling down the mountain
(2) The hill appeared as a black mass in the distance.
(3) The sky was full of dark masses of clouds.

(1) an immensely powerful organization
(2) a rich and powerful man
(3) Only the intervention of powerful friends obtained her release.

(1) A giant iceberg was on a collision course with the ship.
(2) a collision between two trains
(3) Stewart was injured in a collision with another player.

(1) You should receive a reply within seven days.
(2) The ambulance arrived within minutes of the call being made.
(3) Two elections were held within the space of a year.

(1) by eight o'clock he had arrived at my hotel...
(2) We all knew by then that the affair was practically over.
(3) by day a woman could safely walk the streets, but at night the pavements became dangerous...

(1) to write on the blackboard
(2) I can't bear the sound of chalk scraping on a blackboard.
(3) He took out a piece of chalk and wrote his problem on the blackboard.

(1) The children were having fun, chasing each other's shadows.
(2) The ship's sail cast a shadow on the water.
(3) The shadows lengthened as the sun went down.

(1) I know exactly how she felt.
(2) Do exactly as I tell you.
(3) It happened almost exactly a year ago.

(1) The main drawback to it is the cost.
(2) This is the one major drawback of the new system.
(3) He felt the apartment's only drawback was that it was too small.

(1) a military/police/nurse's uniform
(2) soldiers in uniform
(3) The hat is part of the school uniform .

(1) It is compulsory for all motorcyclists to wear helmets.
(2) English is a compulsory subject at this level.
(3) compulsory education/schooling

(1) Let's sit in the shade and keep cool.
(2) Store lemons in a cool dry place.
(3) a room painted in cool greens and blues

(1) There were no messages for me at the hotel.
(2) I left a message on your answering machine.
(3) Jenny's not here at the moment. Can I take a message?

(1) a factory that produces microchips
(2) The region produces over 50% of the country's wheat.
(3) Our cat produced kittens last week.

(1) She's been deliberately ignoring him all day.
(2) He packed up his possessions slowly and deliberately.
(3) The girl gave the show away deliberately.

(1) The scrap is so dull look while stainless steel is so shiny and silvery.
(2) And galley equipments , stainless steel furniture are also in our product catalogue.
(3) Chemical property testing: salt spray test of materials, corrosion test of stainless steel.

(1) Nobody mentioned anything to me about it.
(2) Sorry, I won't mention it again.
(3) Now that you mention it , she did seem to be in a strange mood.

(1) the warm spring sunshine
(2) She brought sunshine into our dull lives.
(3) Hello, sunshine!

(1) The president is a good man...
(2) For me to think I'm any better than a homeless person on the street is ridiculous.
(3) The children were very good...

(1) They had gone two days without food.
(2) He found the place without difficulty.
(3) She spoke without much enthusiasm.

(1) to fly a kite
(2) to kite checks
(3) check kiting

(1) to read for pleasure
(2) He takes no pleasure in his work.
(3) She had the pleasure of seeing him look surprised.

(1) Aren't you forgetting something? (= I think you have forgotten to do sth)
(2) Try to forget about what happened.
(3) Could you possibly forget about work for five minutes?

(1) a front tyre
(2) a back/rear tyre
(3) to pump up a tyre

(1) Did you hear that play on the radio last night?
(2) She has been heard to make threats to her former lover.
(3) Didn't you hear what I said?

(1) The best students are graded A.
(2) I spent all weekend grading papers.
(3) Ten beaches were graded as acceptable.

(1) methods of income generation
(2) the generation of electricity
(3) a new generation of vehicle

(1) It was a joy to see. It really made my day.
(2) Chantal kept a fire burning night and day...
(3) He would have a nurse in constant attendance day and night.

(1) (figurative)Salary is a function of age and experience.
(2) Despite the power cuts, the hospital continued to function normally.
(3) We now have a functioning shower.

(1) The report provides a framework for further research.
(2) We need to establish a legal framework for the protection of the environment.
(3) the basic framework of society

(1) This is Carla. Do you remember her?
(2) I don't remember my first day at school.
(3) He still remembered her as the lively teenager he'd known years before.

(1) the entrance to the museum/the museum entrance
(2) entrancing music
(3) They were refused entrance to the exhibition.

(1) honest to God, Mary, I'm not joking.
(2) I didn't mean it, honest!
(3) It's quite a struggle to make an honest living .

(1) Many people do not like the idea of experiments on animals.
(2) the country's brief experiment in democracy
(3) I've never cooked this before so it's an experiment.

(1) The crash happened seconds after the pilot reported engine trouble.
(2) Call me urgently if you have anything to report.
(3) The company is expected to report record profits this year.

(1) Inflation continues to accelerate.
(2) Exposure to the sun can accelerate the ageing process.
(3) The runners accelerated smoothly around the bend.

(1) chain stores won't let John D . Rockefeller charged a nickel.
(2) That is to say I should aim at big importers and chain stores.
(3) Products wanted: Children's wear and clothings made for the UK chain stores.

(1) The owner of the store was sweeping his floor when I walked in...
(2) She was in the kitchen sweeping crumbs into a dust pan...
(3) I swept rainwater off the flat top of a gravestone...

(1) It's good to meet people from different parts of the country .
(2) open/wooded, etc. country
(3) superb walking country

(1) The plane made a dive to a lower altitude.
(2) Snow leopards live at high altitudes .
(3) The athletes trained at altitude in Mexico City.