– I can’t give up smoking, doctor.
– For your health, I’m afraid you _______.
A. mayB. canC. have to
– Do you like living in your hometown?
– Yes. I’ll ________ to work there after finishing school abroad（国外）.
A. returnB. stopC. remain
– Why do you _______ the radio?
– I’m afraid of waking up the baby.
A. turn upB. turn onC. turn down
He spent little time on study, so it didn’t surprise me that he _______ the exam.
A. tookB. passedC. failed
Many kinds of animals are ______. We must do something to save them.
A. on holidayB. in dangerC. on show
Some people never know what they need ______ they lose it.
A. untilB. asC. after
