Have you ever been in a situation ____ you know the other person is right yet you cannot agree with him?
A. where B. that C. by which D. when
Not until he retired from teaching three years ago ___ having a holiday abroad.
A. he had considered B. had he considered
C. he considered D. did he consider
After ____ seemed about a quarter, Li Lin managed to work out the difficult math problem, which pleased our teacher.
A. that B. it C. what D. which
It is difficult to design a programme that will meet the__________needs of all our users.
A. flexible B. diverse C. average D. precious
What do you think of the proposal that improvement ____ in the type of vacuum cleaner?
A. be made B. will be made C. would be made D. has to be made
______ I spoke English before foreigners, I was a student of high school.
A. The first time B. For the first time
C. At the first time D. At the beginning
