—Is that boy Alan?—No, it ______ be him. He left for Beijing yesterday.

She can hardly write her own name, ______?

(2013·江西九江二模)If you won't do as I tell you, you ________ get the chance to be promoted because the competition is just too fierce.

－What does the sign over there say?－“No person _______ bring drinks into the student computer pool.”

------ Where is my dictionary ? I remember I put it here yesterday . -------- You ______ it in the wrong place .