用所给单词的适当形式填空。

1.  Keep your eyes   __    (close) while doing eye exercises.

2.  Trees can keep water from    __   (run) away.

3.  Do you still remember     __  (see) me somewhere in Shanghai?

4.  He failed many times,  but he didn't give up      __  (study)  math.

5.  People are pretty    __   ( relax) about time in Columbia.