— 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 |
These students are quick at learning. We'll have them __________ with new methods.
A.training | B.to train |
C.to be trained | D.trained |
What he lacks is more patience,___________?
A.isn't it | B.is it | C.doesn't he | D.does he |
I told him what I was surprised____________ his attitude towards his study.
A.is | B.was | C.at is | D.at was |
The visiting Minister expressed his satisfaction with his talk,__________ that he had enjoyed his stay here.
A.having added | B.to add | C.adding | D.added |
I just don't understand_______ that prevents so many Americans from being as happy as one might expect.
A.why it does | B.what it does | C.what it is | D.why it is |