Choose the best answer.

In cold climates, houses need to have walls that will                  heat.

Choose the sentences that are closest in meaning to the given sentence(s).

She had not slept for two days and therefore she wasn’t able to concentrate.

Choose the best answer.

A strong greenhouse effect will warm the oceans and partially melt glaciers, increasing ______.

Choose the best answer to fill in the blank.

_______ me that she would never speak to me again, she picked up her stuff and stormed out of the house.

Choose A, B, C, or D that best completes each sentence.

Sea level rise is usually regarded as Viet Nam’s main _______: a one-meter rise would submerge 40 percent of the country and make millions homeless.

Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following questions.

Coming on top of the previous years of extreme scarcity of food, however, the longer term economic implications were profound.

Choose the best answer to fill in the blank.

______ off the light, we went to bed.