7. Let's set _____ the tent first, and build the fire later.

6. A few scarecrows(稻草人)were set _____ in the field.

5. We'll certainly set_____ a complete modern industrial system.

4. He set _____ to write a history of civilization(文明).

3. Together the four men set _____ to look for the lost animal.

2. They've set _____ on a trip round the world.

1. As soon as she arrived, she set _____ tidying up (整理，收拾)the room.

13. keep watch　　 守望，值班，放哨

12. keep up with　　 跟上

12. put one's heart into