根根句意及汉语提示，用词组填空。

1. I'm going to Shanghai on business next week. Can you ________ (照顾) my pet dog?

2. They told me it would be cheap. ________ (事实上) it cost me nearly 500 yuan.

3. Tomorrow is Mother's Day. I will ________ (起床) early to prepare breakfast for my mother.

4. I hear Maria went to Cuba last week. ________ (顺便问一下), when will she be back?

5. The old man is looking forward to ________ (收到……的来信) his daughter.

常用的整流电路有（）

A、半波整流

B、全波整流

C、桥式整流

D、倍流整流

E、倍压整流