1. Old people must ____ (speak) to politely.
2. You'd better ____ (not eat) too much for supper.
3. The work is easy and interesting. I like it. I think it ____ (finish) in an hour.
4. Every afternoon there are the number of students on the playground. （改错）
5. It is difficult ____such a small child to keep silent so long. （填介词）
6. ----Did you do well in ____ English test?
----Yes, I got ____ A.
(填冠词)
7. This book ____ （not belong）to me. It's his.
8. There are 4 answers here. I really don't know____.
A choose which
B to choose which one
C to choose which
D which one to choose
9. I don't think ____ polite to speak to your mother like that.
A this B that C one D it
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