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25．-We had better ask Bob to help us. ▲ he is away on business.A. So B. And C. Or D. But 【查看更多】

 

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We had better ask Bob to help us. _______ he is away on business.

[     ]

A. So
B. And
C. Or
D. But

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－We had better ask Bob to help us．

－________ he is away on business．

[　　]

A．So

B．And

C．Or

D．But

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