用所给词的正确形式填空:
1.I’m sorry I kept you( waiting )(wait)for a long time .
2.What should we do( to keep )(keep)ourselves healthy
3.She spent two hour( doing )(do)her homework yesterday .
4.The boy taught( himself )(he)English when he was ten.
5.It’s our duty( to do )(do)the work well .
6.You need( to work )(work)harder at your lessons.
7.What about( playing )(play)basketball on the play ground
8.I am afraid of( being )(be) late .
9.My mother told me( not to go )(not go)out at night .
10.Could you please take a message for( him )(he)?