4.(　　 ) Many people are waiting the bus at the bus stop.

A　　　　　　　 B　　　　　 C　　　 D

3.(　　 ) We'd better not to swim in the river.

A　　　　　 B　　　　 C　　　 D

2.(　　 ) There are 　a lot of traffic at the moment. 　Be careful.　

A　　　　 B　　　 C　　　　　 D

1.(　　 ) He's to old to drive a car .

A　 　B　　　 C　　　　 D

4. What are the culours of the traffic lights?

3. Be careful when you across the road.

2. It's dongerous to play on the street.

1. It's near supper time.　 There's a lot of triffic on the road.

4.( 　　) A. laughed　　 B. played　　 C. worried　　 D. pleased

3.(　　 ) A. visit　　　 B. last　　　 C. mistake　　 D. understand