1. 读一读，根据图片提示写出正确的答案。

A. a parachute (降落伞)

B. a sailing boat

C. a hot-air ballon

D. a kite

1. （1） It is round and colourful. It goes up slowly to the sky when there is heat. What is it? It is .
3. （2） It comes down slowly from the sky. A large piece (张，块，个) of cloth (布) keeps the air in. Air keeps it from falling quickly. What is it? It is .
5. （3） It goes up in the air when there is wind. It comes down when there is no wind. Children like to play with it. What is it? It is .
7. （4） It moves on water. Air pushes (推动) it to go. It goes quickly when the wind is strong. It cannot go when there is no wind. What is it? It is .