Students should do everything they can __their study.

A. improve         B. to improve

C. improving       D. improved

—Look! The boy in the white shirt ___be Tom.

--It ____be him. I saw him enter the library just now.

A. must; can’t           B. must; mustn’t

C. may; shouldn’t        D. may; mustn’t

Will you please show me the way to the only tall building ___stands near the post office?

A. which   B. where   C. that   D. who

Our teacher said sound___much more slowly than light.

A. was traveling          B. travels

C. has traveled           D. traveled

Uncle Wang didn’t stop to have lunch __he finished mending the TV set.

A. if B. when C. until D. as

–Oh! There is a snake in front of Jay.

--But it seems that he doesn’t ___the danger.

A. meet B. understand C. predict D. realize

--____are you staying in Ottawa?

--About two weeks.

A. How many B. How long C. How far D. How soon

She opened all the windows _____she could take a bit more of fresh air.

A. so that B. such that C. in order to D. such

—Meat isn’t really dangerous , is it?

--Oh! ____! It’s not at all good for our health.

A. Yes, it isn’t         B. No, it is

C. Yes, it is             D. No, it isn’t

Susan thought ____not easy to answer all these questions.

A. it  B. that  C. them  D. this