根据所给汉语和句子意思,用英语补全句子.

1. Eating more fruit ______________________ (有益健康).

2. The exchange students from Australia are coming. Who ______(带领他们参观)our city?

3. When they got to the station ,the train  _____________(已经离开)for 20 minutes.

4. Some of his advice _________________(值得采纳), I think.

5. Do you think ______________(有必要花)so much time writing blogs every day?

下列关于膨胀玻化微珠的描述，不合理的是（）。

A.轻质

B.绝热

C.耐热性差

D.吸水率小