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
C. came
D. comes
解析:根据题意这本书已经被翻译成了三十种文字从他1973年进入市场以来,这本书是在1973年进入市场的,句子叙述的是一个发生在过去的动作,故应用过去时态,选C。