A：________?

B： I'm afraid you must.

[　　]

I can’t tell when that house 　　　　 exactly, but it must be very long ago.

A．is built            B．will build          C．was built          D．has built

— Must I return the book this week?

— No, you ____. You can _　 it for 20 days.

A. mustn't: keep B. needn't; borrow　 C. needn't; keep　　　 D. mustn't; borrow

此题要求改正所给短文中的错误。对标题号的每一行作出判断：如无错误，则在该行右边横线上画一个勾（√）；如有错误（每行只有一个错误）。则按下列情况改正：　　
该行多一个词：把多余的词用斜线（＼）划掉，并在该行右边横线上写出该词，且也用斜线划掉。　　
该行缺一个词：在缺词处加一个漏字符号（∧），并在该行右边横线上写出该加的词。　　
该行错一个词：在错的词下面划一个横线（___），并在该行右边横线上写出改正后的词。　　
注意：该行若无错, 不要改。　　
It was sunny this afternoon. Mum and I go to               【小题1】________________　　
the park where is near my home for a walk.               【小题2】________________　　
When we were walking, I saw the little girl. She             【小题3】________________　　
was eating a banana. After she finished eating them,     【小题4】________________　　
she threw the banana skin on the ground into the         【小题5】________________　　
park. I walked over to pick it and told her it                           【小题6】               　　
was wrong to do so. If all of us do like that,                   　　
the park has become dirty. Then we can’t                         【小题7】________________　　
enjoy by ourselves in it. All of us must                          【小题8】________________　　
improve our environment and then we can                        【小题9】________________　　
make our environment clean but beautiful.                         【小题10】________________