根据汉语提示完成句子。 1. You can keep the book for two weeks, but you must ______ it ______ ______ ( 按时归还) . 2 —______ ______ ( 劳驾) , could I borrow your bike? — Of course. 3. — Do you have any Project English workbooks? —Sorry, we don’t have any. —______ ______ ______ ______ ______ ( 还是要谢谢你) . 4. —Thank you for your Project English newspapers. — ______ ______ ( 不客气) . 5. ______ ______ ( 多长时间) can I keep these two books?