–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
Uncle Wang didn’t stop to have lunch __he finished mending the TV set.
A. if B. when C. until D. as
Our teacher said sound___much more slowly than light.
A. was traveling B. travels
C. has traveled D. traveled
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
—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
Students should do everything they can __their study.
A. improve B. to improve
C. improving D. improved
