Not until he met with the difficulty _______ the importance of group work.
A. he realized B. did he realize C. realized he D. he didn’t realize
Mary got the first prize in the National Math Competition, ________, for sure, delighted everyone.
A. who B. that C. this D. which
______ he had broken the record, he would be a world-famous runner now.
A. When B. Because C. If D. Though
—Was the driving pleasant when you vacationed in Mexico last summer?
—No, it _______ for four days when we arrived, so the roads were very muddy.
A. has rained B. had been raining C. rained D. has been raining
Why not stay at home ________ the road is so slippery after the heavy snow?
A. in case B. as long as C. now that D. even if
After a thorough search, the rescue team finally brought the mountain climber back, ________.
A. safe and sound B. safely and sound
C. safe and soundly D. safely and soundly
