—Hi, Lydia. Are you going to the concert on Friday?—I’d like to. But there are so many problems_______.
The teacher reported to the headmaster how the class meeting ________ the day before.
There was never any time for Kate to feel lonely, _____ she was an only child.
–No.3 player runs quite fast. --Yes, but there’s no doubt _____ Liu Xiang will win in the end.
Are you ________ of the mistakes you made in your final English test?
Some of this heat near the earth’s surface _________ make electricity.