They would for Guangzhou the next morning and so they went to bed early.A. set outB. set

问题补充：

They would for Guangzhou the next morning and so they went to bed early.

A. set out

B. set about

C. set up

D. set to

答案：

(答案→)A. set out

B. set about

C. set up

D. set to

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