根据句意，用词的正确形式填空。

1. It's cold outside, you should keep the door _____. (close)

2. The man came into the room _____ (quiet) and did some reading.

3. Look! They are listening to the teacher _____.(care).

4. The umbrella behind the door is my _____ (sister).

5. It is _____ (noise) outside. Please close the door.

照片产生反转的原因是（）

A.显影液pH值太高

B.显影液温度太低

C.定影液衰老

D.X线胶片过期

E.由于潜影溴化的结果