--- will the meeting ?---In about 20 minutes. A. How long last B. When last C. How often

问题补充：

--- will the meeting ?---In about 20 minutes.

A. How long, last

B. When, last

C. How often, finish

D. How soon, end

答案：

A. How long, last

B. When, last

C. How often, finish

(答案→)D. How soon, end

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