--These books ____ in the library for along time .--I think

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--These books ____ in the library for along time .--I think they are too old to be read .
A.have kept B.had kept C.have been kept D.were kept
顺便也告诉我第一句话是什么时态啊

C
主语是物,要用被动语态,排除A与B,根据FOR A LONG TIME 可知是现在完成时的被动语态,再排除D
加油!不明白再问!如果帮到你,请采纳,谢谢!
再问：为什么是被动语态就要排除A和B啊，我才学，麻烦讲清，谢谢
再答：被动语态的基本结构是：助动词be +动词的过去分词。而A与B是完成时态。

--These books ____ in the library for along time .--I think Now these magazines__ in the library for a long time. Now these magazines()in the library for a long time These boys read books in the library.改为一般疑问句 I don't think these books are()for young children You are here!I _____ (think) you ____(be ) in the library.适当 I often go to the library in my ____ time. 根据句意填空 I like to enjoy my time ____ in the library on w I always read the books in the library是什麽意思 We ____(borrow)these books from the library since last week. ____ these books to the library, as they will soon be overdu I like reading books in the library 改成否定句