单词填空。

1. Fresh fruit and vegetables c_______ plentiful Vitamin C.

2. Very few people s________ in losing weight and keeping it off.

3. It wouldn't do you any h________ to get some experience first.

4. He showed no m_______ to his enemies.

5. Your mistake resulted in heavy l_______.

6. Dave didn't r_______ to any of her emails, which made her angry.

7. It is a rule that our baggage should be i_______ by customs officers (海关人员).

8. I am busy, so I have to e_______ a housekeeper to look after my children.

智能型水质分析仪可对（）进行定性分析。

A、地表水

B、地下水

C、各种废水

D、饮用水

E、各种溶剂