【推荐1】It’s ____ (they) turn ____ (clean) the classroom.

【推荐2】We use plastic ________ (make) bags and bottles.

【推荐3】用所给词的适当形式填空
1. —How many ________（goose）are there on the river?
—Oh, there’s only one.
2. Do you want ________（share）the room with me?
3. Helen often ________（go）on an ________（out）with her parents. How about you?
4. Kate ________（write）an e-mail to her friend now.
5. —Shall we go to the zoo?
—That ________（sound）great.
6. My aunt ________（live）in Beijing. We visit her ________（two）a year.