问题

However, at times this balance in nature is ______, resulting in a number of unforeseen effects.

A:troubled
B:disturbed
C:confused
D:Puzzled;

正确答案是：

同类题型

ydon’twanttogototheparty,butIdon’tseehowIcanit

On Spring Festival’s Eve, people _____ home to get together with their families.

Did you write to Grace last summer? —No, but I’ll ______ her over Christmas vacation

下列各句中，没有语病的一句是（）

There is no doubt ______ he said at yesterday’s meeting was true