We spend about one-third of our lives sleeping. We know relatively little about sleep.

A. Neither the chickens nor the pigs haven’t been fed.

B. Neither the chickens nor the pigs have been fed.

C. Either the chickens or the pigs have been fed.

D. Not only the chickens but also the pigs have been fed.

A. Although she didn’t try hard to pass the driving test, she could pass it.

B. She tried very hard, so she passed the driving test satisfactorily.

C. No matter how hard she tried, she could hardly pass the driving test.

D. Despite being able to pass the driving test, she didn’t pass it.

A. His car was stolen yesterday, he is a professor.

B. Mr.Smith, who his car was stolen yesterday, is a professor.

C. Mr.Smith, who is a professor, his car was stolen yesterday.

D. Mr.Smith, whose car was stolen yesterday, is a professor.

A. Smallpox is a dangerous disease, and so is malaria.

B. The agreement which was signed yesterday ended six-month negotiation.

C. The agreement which ends six-month negotiation was signed yesterday.

D. The agreement which lasted six-month was signed yesterday.

A. Mr. Smith, to whom I spoke on the phone last night, is very interested in our plan.

B. Mr. Smith, who is very interested in our plan, I spoke to on the phone last night.

C. Mr. Smith, who I spoke on the phone last night, is very interested in our plan.

D. Mr. Smith is very interested in our plan to whom I spoke on the phone last night.

A. She was the first woman being elected as the president of the Philippines.

B. She was the first woman who is elected as the president of the Philippines.

C. She was the first woman to be elected as the president of the Philippines.

D. She was the first woman elected as the president of the Philippines.

A. The man opened the window in order to get some fresh air in the room.

B. The man wanted to get some fresh air in the room because he opened the window.

C. Having opened the window, the room could get some fresh air.

D. The man got some fresh air in the room, even though he opened the window.