--Whose book is this?--It _____ Amy's. Well, her name is on the cover of the book.A. must be B. can't be C. mustn't be
—Haveyouever been toSingapore?—Yes.I therelastyearwithmy parents.
of the coats made of cotton. They feel comfortable.
It’s necessary for you _____ exercise every day.
—I have _________ told your phone number. Has he called you ________?—No, he hasn’t called me _________.
The population of Shanghai is larger than _____ of Shenyang.