1 . The exercises are designed to ________ (strength) your stomach muscles. (所给词的适当形式填空)

2 . Anxiously, she took the dress out of the package and tried it on, only ________ (find) it didn’t fit. (所给词的适当形式填空)

4 . We played cards to ___________(relief) the boredom of the long wait when visiting the doctor. (所给词的适当形式填空)

5 . ________ (catch) the early flight, we ordered a taxi in advance and got up very early. (所给词的适当形式填空)

6 . Peter had no choice but ____(accept) the fact that he had been rejected by the football team. (所给词的适当形式填空)

7 . He passionately desired ________ (continue) his career. (所给词的适当形式填空)

8 . He is too anxious ________ (know) the result of the final examination. (所给词的适当形式填空)

9 . To earn more money，some parents have no option but ______(leave)their children at hometown and work in big cities. （所给词的适当形式填空）

10 . It took years of work ________(reduce) the industrial pollution and clean the water.（所给词的适当形式填空）