About _______ of the books in our school library are written in Chinese.

A. four-fifth B. four-fifths

C. fourth-fifths D. fourths-fifth

—How many students are there in the classroom? —_____. They are all in the lab.

A. No one B. None C. All D. Neither

—Could you tell me ? —Certainly. In half an hour.

A. when will the train to Beijing leave

B. when the train to Beijing would leave

C. when the train to Beijing left

D. when the train to Beijing leaves

—How was your recent trip to Thailand? —I’ve never had one before．

A. the more pleasant B. a more pleasant

C. a most pleasant D. the most pleasant

—Your aunt often walks the dog in the morning. —Yeah, ____ bad weather stops her.

A. until B. unless C. since D. But

The _____ man told us his past before he _____.

A. dying; died B. dead; dying

C. dead; died D. dead; dying

The cruel cook was guilty ______murder. He was involved _____ the case.

A. with , with B. of , in

C. of , on D. in, of

It would be far _________to have robots _____ our homework.

A. good, do B. best, do

C. better, do D. better, to do

I’m not sure ________ he is right or not.

A. if B. whether C. that D. Who

The robot caught a virus. ____________, it didn’t work.

A. In order B. As a result

C. In order to D. However