1 . He has no ability________ (finish) the work independently. (所给词的适当形式填空)

2 . It is my duty ________ (protect) these animals from being killed. (所给词的适当形式填空)

3 . I can’t remember how ________ them all properly. (use) (所给词的适当形式填空)

4 . Her job is ________ (teach) sign language in a school. （所给词的适当形式填空）

5 . I’m writing to aim ____ (apply) for the chance to become a volunteer. (所给词的适当形式填空)

6 . Mom decided ______(divide) the watermelon into ten pieces. (用所给词的适当形式填空)

7 . In my view, mobile phones are only a tool that has the potential________(abuse) and misused. (所给词的适当形式填空)

8 . Tom took a taxi to the airport only______________(find) his plane high up in the sky. (所给词的适当形式填空)

9 . Visitors are requested not ________ (touch) the exhibits. （所给词的适当形式填空）

10 . The most difficult thing for a wise woman to do is to pretend ________ (be) foolish. （所给词的适当形式填空）