1 . 连线题。
1. put away                         a. （使）保持
2. keep                                b. 遵守
3. keep to                            c. 把（某物）收起来
4. stay                                   d. 停留
5. cut                                     e. 懂；理解
6. understand                         f. 当心，小心
7. take care                            g. 划伤

2 . We should _____(keep / stay) to the rules at school.

3 . You must keep ______ the grass. (       )

A．to

B．on

C．up

D．off

4 . ________when you are walking on a bridge. (        )

A．Work quietly

B．Keep your desk clean

C．Keep to the right