-How long can I keep this book?-It must ___ (return) by Wednesday_英语解答

-How long can I keep this book?-It must ___ (return) by Wednesday.

人气：126 ℃　时间：2019-12-04 02:08:21

解答

你好楼主,
值此中秋佳节,我衷心祝你快乐.
此处应该填be returned
因为是被动语态的啦
还有问题可以问我~~~