— Can you tell me what Tiangong 1 is? — Tiangong 1 is used_______ a space laboratory (实验室). A. by B....
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题目内容：
— Can you tell me what Tiangong 1 is?
— Tiangong 1 is used_______ a space laboratory (实验室).
A. by B. with C. as D. of
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