Listen! Someone is knocking at the door. Who _____it be?—It _____be Tom. He phoned to visit me this evening.

Excuse me, does Mr. Chen live here?—He ______ be here, but he has moved to Nanjing.

Sheleft_______ahurry_______shedidn’tsay”good-bye”tohermother. [ ]

There are two _____people living in the city.

____ do you go to your school library?—Three times a month. [ ]