4．我们将乘坐飞车去上班和回家。

　 We’ll fly to ____ and ____ home.

3．他必须在六点之前到家。

　 He ____ return home ____ six.

2．我们应该保护环境。

　 We ____ ____ the environment.

1．你明天不必去游泳了。

　 You ____ go ____ tomorrow.

4. 在月亮上

3. 在未来

2. 到某地旅行

1. 长大

5. He maybe over thirty years old, but he looks younger.

4.–Listen! Helen is singing in the next room.

　-It may not be Helen. She has gone to Shanghai.