问题

Trees ______every spring in North China.
A:have planted
B:will plant
C:were planted
D:are planted
B:will plant
C:were planted
D:are planted
正确答案是:
同类题型
I don’t knowhe will come tomorrow,he comes, I will tell you.
Come and see me whenever ___________.
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Can I walk across the road now, mum? — No, you_______. You have to wait until the light turns green.
Please ask ___________. He may know which one is __________.