Carol said the work would be done by October ＿＿＿＿＿personally I doubt very much.　A. it　B.

问题补充：

Carol said the work would be done by October, ＿＿＿＿＿personally I doubt very much.

A. it

B. that

C. when

D. which

答案：

A. it

B. that

C. when

(答案→)D. which

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