题目内容

______ is not necessary if you want to take care of the planted seeds.

A. To fill the box with the cut grass
B. To water them every day
C. Some liquid fertilizer
D. To prevent birds from eating

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A. make liquid fertilizer
B. make a rooftop box
C. cover the roof with grass
D. build a rooftop garden

A. Yes, I did.
B. Yes, I am.
C. No, I don't.
D. That's right.

A. Yes, we should.
B. In the bin.
C. You are right.
D. My pleasure.

A. That's OK.
B. Not so good.
C. That's all right.
D. Yes, it is.