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Before using the machine, you must carefully to these instructions．A.joinB.join

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Before using the machine, you must carefully to these instructions．A.joinB.join

Before using the machine, you must ________ carefully to these instructions．

A.join

B.join in

C.take part in

D.attend

试题答案

D

attend to留心。

标签：mustyoutocarefullyusing

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