问题
Why do you do volunteer work in the North—West— I_____ to improve the lives of the children there through my efforts.
A:was trying
B:have tried
C:am trying
D:tried;
B:have tried
C:am trying
D:tried;
正确答案是：
同类题型
Hold the book ______ please, for I can’t see the words in it clearly.
A cough is usually nothing to worry about unless itlasts for ten days _____
She in the big city, but now she in the small town with her children.
The pilot lost control with the military base,the plane crashed in the desert.
We need a ____________ team leader who can really motivate the members to work harder.