—It’s already 11 o’clock , and he ______ have been here half an hour ago.
—Maybe he got caught in the rain.
A. must B. ought to
C. may D. can
—Thank Goodness! We have completed our task before the deadline. It is very kind of you to help us.
—______.
A. With pleasure B. That’s all right
C. By all means D. OK
The study shows that smoking may generate long-term stress, even if people feel it offers them ______ relief from tough situations.
A. temporary B. original
C. primary D. appropriate
Many experts hold the view________ teachers’ development is ________ the key to better education lies in.
A. that; which B. that; what
C. that; where D. which; where
—When shall we set about doing our work?
—______ all the group members are here.
A. Until B. Since
C. Unless D. Not until
With the help of curriculum reform, students enjoy a variety of after-school activities, ______ up to half are aimed at strengthening their physical strength and building up their confidence.
A. to which B. of which
C. from which D. in which
