Every year a flood of farmers arrive in Shenzhen for the money-making jobs they_____ before leaving their hometowns.
A. promised B. were promised
C. have promised D. have been promised
.By the time Jack returned home from England, his son _____ from college.
A. graduated B. has graduated
C. had been graduating D. had graduated
In class 10 there are 60 students, and more than half_____ wear glasses.
A. in whom B. in them
C. of them D. of whom
------Mom, is Dad coming to pick us up?
------Yes, I am sure he _________ on the platform when we pull into the station.
A. stands B. stood
C. has stood D. will be standing
___________ is known to everyone, the moon travels round the earth once every month.
A. It B. As
C. That D. What
Taking exercise is the key ______ your health.
A. to improve B. to improving
C. in improving D. of improving
