is no good always complaining about life. At least we are living.A. It B. ThereC. This D.

问题补充：

is no good always complaining about life. At least, we are living.

A. It

B. There

C. This

D. That

答案：

(答案→)A. It

B. There

C. This

D. That

解析：这句话的实际主语是always complaining about life，故选A，用it做形式主语，总是抱怨生活没有好处。