根据句子的意思和首字母提示，用适当的词填空，使句子的意思连贯与正确。

1. Your trousers are d_____. You must wash them.

2. Have you seen my pen? I can't f_____ it.

3. We usually have three m_____ a day.

4. S_____ is the best season for planting trees.

5. We listen with our e_____.

6. Fifteen and twenty-five is f_____.

7. It often s_____ in the north of China in winter.

8. —Have you ever been to Xi'an?

     —Yes, I have been there t_____.

患者夜盲3个月余，伴视物模糊，无外伤史，无明显家族史。

若诊断为高风雀目，眼部检查最可能的发现是（）

A.视力下降

B.阵发性视物模糊

C.视 * * 色变浅

D.眼底血管变细

E.外眼正常