—Is that boy Alan?—No, it ______ be him. He left for Beijing yesterday.
Where is my raincoat? I can’t it.
— do you go to school every day? — By bus.
My family always have a party the evening of Christmas.
The new treatments ____by Norman Bethune helped a number of soldiers .
----Can you finish ___ these books before 10 o’clock? ----Yes, I can .