问题

Some people fear that ______ air pollution may bring about changes in ______ weather around the world.
A:/, the
B:the, /
C:an, the
D:the, a
B:the, /
C:an, the
D:the, a
正确答案是:
同类题型
“________ do you exercise?” “Three times a week. ”
He paid the boy £10 for washing the windows, most of _____ hadn’t been cleaned for a year. [ ]
Must I hand in my report now? — No, you ________. You still have some time.
____ present our vacations are too short. [ ]
I found ____ hard to get out of bed on cold winter mornings.