A. Some scientists were accused of having falsify the effects of climate change.

B. Some scientists were accused of having been honest about the effects of climate change.

C. Although some scientists have distorted the effects of climate change, they were not accused.

D. Some scientists were accused of having falsified the effects of climate change.

A. We can no longer remember having advised you on how to decrease your energy use.

B. We remember having advised you on how to maintain your energy use.

C. We remember having advised you on how to decrease your energy use.

D. We remember to have advised you on how to decrease your energy use.

A. They were praised for having decided to decrease their carbon footprints.

B. They were not punished for having decided to decrease their carbon footprints.

C. Unless they decided to cut down their carbon footprints, they were praised for that.

D. If they decided to cut down their carbon footprints, they would be praised for that.

A. Unless he donated a lot of money to environmental protection campaigns, he was admired.

B. He was admired for having donated a lot of money to environmental protection campaigns.

C. If he had donated a lot of money to environmental protection campaigns, he would have been admired.

D. If he donates a lot of money to environmental protection campaigns, he will be admired.

A. Having denied his company's damage, he took responsibility for it.

B. He denied having damaged to his company's area.

C. He denied having taken responsibility for the damage to his company's area.

D. He denied having said that he would take responsibility for his company's damage to the area.

A. Global warming can't be controlled by planting trees.

B. Planting trees is the only way to control global warming.

C. Planting trees can accelerate global warming.

D. Planting trees can help reduce global warming.

A. Carbon dioxide is the only greenhouse gas that causes global warming.

B. Global warming results in greenhouse gases, including carbon dioxide.

C. One of the main greenhouse gases that lead to global warming is carbon dioxide.

D. Global warming causes greenhouse gases, including carbon dioxide.

A. Heat-related illnesses result from the increase in earth's temperature.

B. Heat-related illnesses result in the increase in earth's temperature.

C. Heat-related illnesses lead to the increase in earth's temperature.

D. Heat-related illnesses trigger the increase in earth's temperature.

A. Numerous catastrophic consequences result in climate change.

B. Numerous catastrophic consequences result from climate change.

C. Climate change results from numerous catastrophic consequences.

D. Numerous catastrophic consequences cause climate change.

A. We decided to reduce carbon footprints before seeing people suffer global warming consequences.

B. We saw people suffer global warming consequences after we decided to reduce carbon footprints.

C. We decided to cut down on carbon footprints after we saw people suffer global warming consequences.

D. We decided to cut down on carbon footprints before we saw people suffer global warming consequences.

A. difficultly

B. serious

C. pleased

D. dangerously

A. at

B. in

C. into

D. to

A. to

B. for

C. from

D. in

A. talk

B. tells

C. answer

D. ask

A. reused

B. recycled

C. product

D. reduced

A. save

B. saving

C. to save

D. saves

A. trees

B. paper

C. electricity

D. water

A. If their wages are not increased, the workers plan to strike.

B. The company raised the workers' wages to avoid a strike.

C. The company demands that the workers strike.

D. The company threatened to pay the workers less.

A. The teacher asked his students why they always made terrible mistakes.

B. The teacher realized that his students always made terrible mistakes.

C. The teacher complained about his students making terrible mistakes.

D. The teacher made his students not always make terrible mistakes.

A. I had An clean up her bedroom before I let her going out to play.

B. I had An cleaned her bedroom before letting her go out for playing.

C. I had An clean up her bedroom before I let her go out to play.

D. I had An to clean her bedroom before letting her go out to play.