.. If Mary carries on working like this she will sooner or later.A. put downB. get downC

问题补充：

.

. If Mary carries on working like this, she will sooner or later.

A. put down

B. get down

C. break down

D. go down

答案：

A. put down

B. get down

(答案→)C. break down

D. go down

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