用括号里所给动词的适当形式填空。
You’d better        (not run) after supper. It’s bad for your health.
Didn’t your teacher tell you that light       (travel) faster than sound?
Not only Jim but also his sister       (visit) a few cities in the south since they came.
Please knock at the door before       (enter) the room.
Look! Here         (come) Simon, he looks smart.