how long can the students____the school library books?(借）我的答案是keep,而标准答案是have kept,究竟是谁错?郁闷.

'How long can I 英语翻译How long can the generator run withot refueling? How long can the elephant live at most How long _______ the book _________(can keep)? How long can I borrow the book?哪里错了 How long can he keep/keeps the book? how long can the food ( )Akeep B hold out 翻译 How long can I keep the instrument? How long can they live? How long I can hold __ can I get to the theatre?A.How far B.How soon C.How long D.How much time__ can I get to the theatre?A.How far B.How soon C.How long D.How much time How long can the children swim in the pool in a How long can the children swim in the pool in a day? Could you tell me how long I can keep the book.为什么用I can How long can the book be （）?How long can the book be （）?For two weeks .A.boorrowedB.lentC.keptD.gotE.taken 改错：how long can i borow the book from the library? How much can I afford?How long can hold? How long is the forever? How long does the love