1 . If you c________ your legs often, you will have O-shaped legs.

2 . Look! An old man ________ (cross) the street. Let’s go up to help him.

3 . It is dangerous ________ (cross) the road now. There are too many cars.

4 . Light comes in ________ the window.

A．cross

B．across

C．past

D．through

5 . You should always look at the traffic light before ________ (across) the road.

6 . We must look right before ________ (cross) the road.

7 . John was seen to cross the street just now by someone.（改为主动句）
Someone ________ John ________ the street just now.

8 . Teachers say that children must not ________ the road alone.

A．across

B．crossing

C．cross

9 . 对不起！请不要越线！
______________________________________

10 . 过马路时，我们应该小心车辆。
We should ________ ________ ________ the traffic when we ________ the road.