Four things are needed for a small rooftop garden. One thing is a roof that can

游客2023-10-04  26

问题 Four things are needed for a small rooftop garden. One thing is a roof that can ______. [br] It is important to ______ until the plants begin to grow.

选项

答案 keep the grass wet

解析 依据第四段的第一行,可得出答案。
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