The librarian told us that we could borrow at most three books __________.
A. at a time B. all the time
C. from time to time D. on time
— Why do English people talk so often about the weather when they start a conversation?
— Because the weather is a __________ subject.
A. serious B. good C. close D. safe
Checking your answers before handing in your paper can help you __________ mistakes.
A. make B. provide C. avoid D. advise
It’s kind __________ Yao Beina to donate her corneas (眼角膜) _________ three people in need.
A. of; to B. for; to C. of; for D. for; for
Many people do not realize the importance of health __________ they have fallen ill.
A. since B. until C. while D. After
Robin broke his left leg in the basketball match last week, since then he __________ in bed.
A. lay B. has lain C. laid D. has laid
