请认真阅读下列各句，在答题卡上标有题号的横线上，写出空缺处该动词的正确形式。

小题1:My parents   (be)at home on weekends.

小题2:He always   (have)his first lesson at 7:30.

小题3:   (not open)the door, it's too cold outside.

小题4:Would you like   (fly)kites in the open air with us?

小题5:My classmates often   (play)football after school.

小题6:Mr. Wu   (not be)our English teacher.

小题7:Lucy, why not   (go)running after supper?

小题8:   your mother   (wash)the dishes after dinner?

小题9:Let Millie   (tell)us an interesting story.

小题10:It's time   (begin)our class.

三峡工程可能引发的问题有哪些？（）

A.水污染

B.地质灾害

C.淹没文物古迹

D.移民安置以及由此引发的水土流失加剧