词汇考查。

1. There are many tall b________ in our city now.

2. The students of Class One all went to the party e________ Bill.

3. Mum is cooking in the k________.

4. I am very glad to hear that you are in good h________.

5. M________ doesn't always bring happiness.

目前向采煤工作面提供压力液体的乳化液泵大多采用卧式（）柱塞泵。

A、3

B、4

C、5

D、6