My family are going to have a party to celebrate my grandpa’s ______birthday.

A. ninety B. ninetiesC. ninetiethD. ninetieths

Jill_______be in the office now. She has gone to the reading room.

A. can’t B. mustn’tC. needn’tD. shouldn’t

Michael’s mother never makes him______his room. He does it by himself.

A. cleaningB. cleans C. to clean D. clean

The scientists will succeed in their experiment______ they give up.

A. unless B. if C. after D. until

The number of the cars ________ greatly since 2008 in the small town.

A. had increased

B. has increased

C. was increasing

D. increased

—These days， teenagers often have to do what they ______ to.

— It’s not good for their independence. They need to think on their own.

A. tell

B. are telling

C. are told

D. were told

Some of my friends are interested in science， but none of them can tell ________.

A. when UFOs appeared next time

B. that horses know the way or not

C. where was this kind of plant found

D. how elephants communicate

— How do you like Guilin?

— It’s really a beautiful city， and its fantastic landscape___________ me a lot.

A. expressed

B. impressed

C. explained

D. complained

To an engineer， a miss is __________ a mile. They can’t afford to make any mistakes.

A. as much as

B. as well as

C. as many as

D. as good as

Bob is taking the desks away because they__________ too much room.

A. take up B. pick up C. stand up D. put up