一、用括号内所给词的适当形式填空。
1. We were (relax) to swim in the river.
2. (spend) time with friends is enjoyable.
3. He went out without (say) any words.
4. It's very boring (play) such a game.
5. They plan (travel) to Kunming next week.
6. Our teacher often walks around our classroom, (ask) us some questions.
7. You'd better learn some table (manner) before going to a party.
8. I wonder if it is right (knock) at her door before coming in.
9. The museum is certainly worth (visit).
10. If there are people in the meeting room, you are supposed to knock before (enter).

1. relaxed 2. Spending 3. saying 4. to play 5. to travel 6. asking 7. manners 8. to knock 9. visiting 10. entering