The homework ______ before the deadline., a) should finish, b) should have been finished, c) should be finished, The mistake ______ earlier., could have been corrected, could be corrected, could correct, The project ______ tomorrow., will completed, will complete, will be completed, The homework ______ before the class starts., must finish, must be finished, must finished, English ______ in many countries., can be spoken, can spoken, can speak, The lesson ______ better., could explain, could have been explained, could be explained, The book ______ last week., might have been returned, might be returned, might return, The email ______ yesterday., must send, must have been sent, must be sent.

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