4．We should brush our 　　　　　　　　(牙齿) every day.

3．I dreamt that I was busy 　　　　　　　(植) trees all night long.

2．His knees 　　　　　　　　(痛) badly yesterday.

1．You’ll find the 　　　　　　　　　　(图书馆) on the left.

15．I saw the thing 　　　　　　　　(happen) when I was walking.

14．What 　　　　　you 　　　　　　　　(do) at soon yesterday?

13．Some boys forgot 　　　　　　　　　(do) their homework.

12．After having a short rest, they went on 　　　　　　　(play) football .

11．　　　　　 　(be) you born in Tianjing?

10．The disease kills 　　　　　　　(million) of people every year .