We shouldn’t complain about because many families are much in the mountainous area.A. be

问题补充：

We shouldn’t complain about, because many families are much in the mountainous area.

A. being poor; worse off

B. being rich; better off

C. to be poor; badly off

D. to be rich; well off

答案：

(答案→)A. being poor; worse off

B. being rich; better off

C. to be poor; badly off

D. to be rich; well off

解析：本题的含义是我们不应该抱怨贫穷，因为在山区许多家庭的情况更糟糕，about为介词后跟doing，worse off表示更糟糕的意思，故本题选A。