你知道填哪一个更准确吗?  

1. It's _       (on, in) the first floor.

2. Do you have lunch          (at, in) school?

3. It's time           (to, for) watch TV.

4. It's time           (to, for) breakfast.

5. These are         _ (he, his) pants.

6. Let            (I, me) close the door.

7. It's             (snow,  snowy) here.

8. What's the matter            (with, for) you?

9. How many            (sheep, sheeps) do you have?

10. It's cool           (in, at) Lhasa.

某机房现有4台机房专用空调，各室内机下均装有水浸探头，近一段时间3号机时常出现水浸告警，其原因是不可能是下列哪个（）

A、室内风机转速不够

B、蒸发器表面脏

C、膨胀阀故障

D、R-22过多