选出可以代替画线部分的一项。
1. What will happen to our human beings 100 years from now?
A. 100 years ago
B. 100 years before now
C. since 100 years ago
D. in 100years
2. If you keep finishing your homework in this way, you will not be able to pass your exams.
A. mustn't
B. needn't
C. can't
D. shouldn't
3. I think this method is very simple.
A. easy
B. difficult
C. different
D. hard
4. I went to Shanghai last year and fell in love with it.
A. fell down with
B. had a great time in
C. began to love
D. didn't like seeing
5. —I think maths is more useful than P. E.
—I don't agree with you, They are both useful.
A. I don't think so
B. I don't know
C. I have no idea
D. I think you're right