Choose the best answer to complete the sentences.
Certain _______ in the atmosphere, such as carbon dioxide, methane and nitrous oxide, block heat from escaping.
A.effect
B.emissions
C.gases
D.layers

Choose the best answer to complete the sentences.
A strong greenhouse effect will warm the oceans and partially melt glaciers, increasing _______.
A.temperature
B.sea water
C.sea level
D.pollution

Choose the best answer to complete the sentences.
The clearing of land for agriculture, industry and other human activities have increased _______ of greenhouse gases.
A.concentrations
B.attention
C.lots
D.collections

Choose the best answer to complete the sentences.
The public praised the local farmers for _______ millions of trees on the surrounding hills.
A.plant
B.being planted
C.being planting
D.having planted

Tim: Do you work full time at the supermarket? Mary: No, only_________when they need extra staff.
A.on and off
B.in and out
C.by and by
D.up and down

The government is thinking of bringing__________ a law to make it compulsory for cyclists to wear helmets.
A.on
B.up
C.in
D.round

I would rather you____________me about your problem earlier so that we could find out solutions for it.
A.told
B.had told
C.tell
D.would have told

It turned out that we______________rushed to the airport as the plane was delayed by several hours.
A.hadn’t
B.should have
C.mustn’t
D.needn’t have

Although younger than the other children, she demanded____________in the game.
A.to include
B.to be included
C.to have included
D.being including

A.Dimension
B.Expansion
C.Confusion
D.Tension