the book has been translated into thirty languages since it ------on the market in 1973
问题描述:
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
我知道选c,可我想问问ABCD分别是什么时态啊
答
A是过去完成时
B是现在完成时
C是一般过去时
D是一般现在时