The place _______ the bridge is supposed to be built should be ________ the cross-river traffic is the heaviest.
A. which; where B. at which; which
C. at which; where D. which; in which
-- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
-- Oh, dear! She _______ a lot of difficulties!
A. may go through B. might go through
C. ought to have gone through D. must have gone through
In our childhood, we were often _______ by Grandma to pay attention to our table manners.
A. demanded B. reminded C. allowed D. hoped
They _______ on the program for almost one week before I joined them, and now we________ on it as no good results have come out so far.
A. had been working; are still working B. had worked; were still working
C. have been working; have worked D. have worked; are still working
David has won the first prize in singing; he is still very excited now and feels________ desire to go to bed.
A. the most B. more C. worse D. the least
________ in the mountains for a week, the two students were finally saved by the local police
A. Having lost B. Lost C. Being lost D. Losing
