根据括号中所给的汉语写出单词，使句子意思完整正确。

1. Boys and girls, I have something important to tell you. May I please have your              (注意)?

2. Andy found it hard to               (相信) that Steven was a real detective.

3. Farmers complained the               (不公正的) competition from cheap imported (进口的) food.

4. Do clothes               (熨烫) more easily when they are wet.

5.                (刀) and forks will be necessary when we have western food.

可用出口阀调节流量的是（）。

A、离心泵

B、往复泵

C、比例泵

D、以上均错误