We tried our best to ______, but she didn’t stop crying.
A. call her up B. cheer her up C. give her up D. wake her up
By the time of last year, she ______ the piano for five years.
A. learnt B. has learnt C. had learnt D. will learn
Tom likes the book ______ she borrowed from Jim.
A. who B. that C. whom D. whose
—Listen! Peter is singing in the classroom!
—It _____ be him. He has gone back to his hometown.
A. must B. mustn’t C. may not D. can’t
Keys _______ opening the lock in the door.
A. used for B. are used C. are used to D. are used for
—I have never been to the Great wall.
—If you have an opportunity _______ there, you must take it.
A. to go B. to going C. going D. go
