all the demands had been refused to go on strike.A. Only; did the workers decideB. Not u

问题补充：

all the demands had been refused to go on strike.

A. Only; did the workers decide

B. Not until; the workers decided

C. Not until; did the workers decide

D. Only after; the workers decided

答案：

A. Only; did the workers decide

B. Not until; the workers decided

(答案→)C. Not until; did the workers decide

D. Only after; the workers decided

解析：考查倒装句，否定词放在句首，使用部分倒装，从句不倒装，主句倒装，句意：直到所有的要求被拒绝之后工人们才决定罢工。所以选C，若选D，主句应倒装。