-- 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
I'm moving to the countryside because the air there is much fresher than________ in the city.
A. ones B. one C. that D. those
