1. in turn _____
2.  by turns_____
3. take one's turn ______
4. take turns_____
5. on the turn ______
6. out of turn_____
7. The girls called out their names_____ .
     那些女孩儿逐一报出了自己的名字.
8. We make every effort to make more films, and____ this creates further environmental pollution.
    我们在竭力生产出更多的电影,反过来这又造成了进一步的环境污染.
9. We kept watch____.=We____ to keep watch.
     我们轮流守望.
10. I was about to end up the meeting when he interrupted me _____. 
     我正要结束会议,这时他鲁莽地打断了我.