His handwriting is not very neat. In fact, it is sometimes very difficult to _______.
A. justify
B. examine
C. identify
D. check
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_______ 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
I _______ my breakfast when the morning post came.
A. had
B. had been having
C. haven been having
D. was having