— Look, it _____ be Jack who is at the gate of the library.It _____ be him. He has gone abroad.may; must B. must; mayn’t C. must; can’t D. can; mayn’t
The manager put up a notice to keep the staff ________of what to do this week.
_____ I can’t fully understand what his music conveys, his performance is quite impressive.
His uncle went abroad in 2010, and ________since.
It is required in the library regulations that any book borrowed __________ by due time, or the borrower will be fined.
I broke my relationship with John because he always found _______ with me.