问题

___ environmental damage is done, it takes many years for the ecosystem to recover.

A:Even if
B:If only
C:While
D:Once;

正确答案是：

同类题型

How much is this______—It’s two dollars.

te the old town is the 5500 meters YulongXueshan Mountain, its peak_______ with snow

ung couple, who returned my lost wallet, left _______ I could ask for their names.

I have worked with children before, so I know what ______ in my new job.

Rainforests _____ and burned at such a speed that they will disappear from the earth in the future.[ ]