摘要： They want to know do to help us. A．what can they B．how they can C．what they can D．how can they
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They want to know ________ do to help us.
A．what can they B．how they can C．what they can D．how can they
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They want to know ________ do to help us.
A．what can they B．how they can C．what they can D．how can they
查看习题详情和答案>>They want to know do to help us.
A．what can they B．what they can
C．how they can D．how can they
查看习题详情和答案>>