单项填空
21. Julia felt superior, when she was a general manager, _____ many respects _____ her colleague.
A. to…in B. in…to C. by…to D. to…by
22. “Since metals will expand when heated and contract when cooled”, the little boy said, “Holidays in summer should be longer than _________ in winter.”
A. that B. one C. those D. these
23. My friend has returned from the UK. She ____ at Oxford for four years, during which we communicated with each other on the Internet.
A. studied B. has studied C. had studied D. has been studying
24. John _____ a restless person, for he kept transferring from one company to another.
A. must be B. must have been C. should have been D. should be
