问题
填空题
想一想，填一填。
1. It's (on, in) the second floor.
2. Do you have lunch (at, in) school?
3. It's time (to, for) go to bed.
4. It's time (to, for) lunch.
5. These are _____ (he, his) pants.
答案
1. on 2. at 3. to 4. for 5. his