问题

We all should make a contribution to ______ our environment.

A:protects
B:to protect
C:protecting
D:protect;

正确答案是：

同类题型

wonder what I should learn in the future.—You may learn art since you painting and drawing.

Would you like______ to eat —Yes, please.

The town is so beautiful! I just love it.—Me too.The character of the town is well ________.

d I could hardly work together,_____

一Daisy, go and see what is happening to the windows.一Nothing serious. The heavy rain is beating them.