U.S News____ ranking of colleges since 1983. They are a very popular resource for students looking to apply to a university campus.
A. maintains
B. is maintaining
C. maintained
D. has been maintaining
查看答案
When you finish your work, don’t forget to put the tools back where they _____ .
A. are
B. will be
C. were
D. had been
When she came out, Mary looked a bit tired because she ______ the house.
A. cleaned
B. was cleaning
C. had cleaned
D. had been cleaning
—Is Tom still not back?— No. By next year he _____ from home for three years.
A. will leave
B. will have been away
C. leaves
D. has been away
The boy was caught cheating in the exam and _____by his headteacher at the moment.
A. was questioned
B. has questioned
C. is being questioned
D. has been questioning