Not until he failed in the last examination _________ he should have spent more time on study.
A. did he realize B. he realized C. did he not realize D. he didn’t realize
As a saying goes, the wise man knows he knows nothing, _________ the fool thinks he knows all.
A. when B. while C. as D. though
We should show _________ concern for Mr. Smith, _________ eighty-year-old man near our home because now he has nobody to depend on.
A. /; a B. the; a C. /; an D. the; an
Despite many worries before finishing the task, everything _________ well.
A. turned out B. put out C. gave out D. broke out
According to the traffic rules, you _________ wear the safe belt while you are driving.
A. can B. need C. may D. shall
To smoke a cigarette after meals seems to him a habit _________.
A. to never break B. never to have broken
C. never to be breaking D. never to be broken
