Be quick!They are waiting for you( )the box.A,opening B,to openC,opened D,open

Be quick!They are waiting for you( )the box.A,opening B,to openC,opened D,open

选B
waiting for sb to do sth 等待某人去干某事 （事情还没干）

【B】
【wait for sb to do sth】等某人做某事

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A

B.
waiting for sb to do sth 等待某人去做某事