问题
What’s your question —I want to know _________.
A:how can treeshelp us
B:how do treeshelp us
C:how treeshelp us
D:how can wehelp trees
B:how do treeshelp us
C:how treeshelp us
D:how can wehelp trees
正确答案是：
同类题型
Green products are becoming more and more popular because they are environmentally_______.
I had hoped to get to the meeting, but I found at the last minute that I couldn’t ________ it.
Are you feeling _______ better today?—- No, I’m feeling _______ worse.
__ this is not the right way to thestation, what shall we be ________ to do
It is easy to learn English well, isn’t it–_____. You should spend much time on it.