-- will you be back from your hometown.?---In two days.A. How longB. WhenC. How oftenD. Ho

问题补充：

-- will you be back from your hometown.?---In two days.

A. How long

B. When

C. How often

D. How soon

答案：

A. How long

B. When

C. How often

(答案→)D. How soon

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