题目内容
根据句意在空白处填上词组或短语:
A helicopter(直升飞机)is able to ________ ________ and land straight up or down.
答案:take,off
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题目内容
根据句意在空白处填上词组或短语:
A helicopter(直升飞机)is able to ________ ________ and land straight up or down.