1 . They were preparing ________(cross) the river when it began to rain. (用所给词的适当形式填空)

2 . You are an adult now and you should know better than to ________(behaviour)like that. （所给词的适当形式填空）

3 . She never wavered in her determination to ________(successful) in being admitted into the club. (所给词的适当形式填空)

4 . Attempts are being made to ________(solution) the problem of waste disposal. (所给词的适当形式填空)

5 . I failed ________(catch) the early bus, so I was late for work.(所给词的适当形式填空)

6 . It can also cause your imagination ________(do)some funny things at times. (所给词的适当形式填空)

7 . Absolutely, I admire the firefighters because they are so kind and they don’t seem ______ (be) afraid of danger. (所给词的适当形式填空)

8 . Russia will remain a strong country determined ________ (protect) its sovereignty and interests. (所给词的适当形式填空)

9 . We should do something together at weekends so as to ________ (strength) our relationship. (所给词的适当形式填空)

10 . They arranged for them________ (leave) the following week. （所给词的适当形式填空）