As we all know, it is usually cold in this place in January, but it _____ be warm sometimes.

—We will go to the Wushan Square this afternoon, why not take a bus? —We ________ take a bus , it’s only one kilometer or more.

— Look at the boy playing basketball on the ground. Is it George?— It ________ be him. He told me he would play basketball after class, but he’s not sure.

(2010·四川高考)—________ I take the book out?—I'm afraid not.

---- May I smoke here?---- If you      , choose a seat in the smoking section