His father _______ English here since he graduated from Peking University.
A. has taught
B. teaches
C. taught
D. had taught
查看答案
His handwriting is not very neat. In fact, it is sometimes very difficult to _______.
A. justify
B. examine
C. identify
D. check
_______ on the tower, we could see the whole city.
A. Standing
B. Stand
C. Stood
D. To stand
Tom, you _______ play with the knife. You _______ hurt yourself.
A. won’t; can’t
B. mustn’t; may
C. shouldn’t; must
D. can’t; shouldn’t
By the time he was 12, Edison _______ to make a living by himself.
A. would begin
B. has begun
C. had begun
D. was begun