________ some teenagers don’t realize is ________ difficult life can be after they get
addicted to drugs.
A. That, how B. That, what
C. What, what a D. What, how
Please correct the mistakes ________.
A. if there are B. there are mistakes
C. if any D. if any mistakes
The ________ look on his face suggested he ________ that.
A. surprising, hadn’t expected B. surprising, should expect
C. surprised, wouldn’t have expected D. surprised, hadn’t expected
Attention, please! And keep ________ when I am taking a photograph of you.
A. still B. calm C. quiet D. silent
______ him to do like this, he wouldn’t have made such a serious mistake in his
writing.
A. Did you persuade B. Had you persuaded
C. If you should persuade D. If you persuade
The house is too old. It requires ________.
A. to repair B. repairing
C. repaired D. repair
