The book has been translated into thirty languages since it on the market in 1973.A. had

问题补充：

The book has been translated into thirty languages since it on the market in 1973.

A. had come

B. has come

C. came

D. comes

答案：

A. had come

B. has come

(答案→)C. came

D. comes

解析：考查时态：since后面的时态是过去时，主句是现在完成时，句意：自从1973年上市，这本书已经被翻译成30种语言。选C。