1 . She has always been encouraged to swim to build up the _________(strong) of her muscles. （所给词的适当形式填空）

2 . My brother is trying to improve his ________ (fit) by cycling and swimming. (所给词的适当形式填空)

3 . To my ________ (amaze), the little girl was able to recite the whole poem from memory. （所给词的适当形式填空）

4 . As players, you are sure to experience the excitement of victory or the pain of ________ (fail) .(所给词的适当形式填空)

5 . A lot of small companies are having to fight for________ (survive). （所给词的适当形式填空）

6 . He was competing with four other________ (compete) for the job.（所给词的适当形式填空）

7 . Many________ (成年人) have some problems with using smart phones. (根据汉语提示单词拼写）

8 . In my ________ (young), I made up my mind to become a teacher in the future. (所给词的适当形式填空）

9 . She was possibly the greatest writer of her________(一代人). (根据汉语提示单词拼写）

10 . If you leave your arms out，they will float free in zero ________ (重力). （根据汉语提示单词拼写）