---Listen! Someone is knocking at the door. Who _____it be?---It _____be Tom. He phoned to visit me this evening.
We all want to know________she will come to the party or not.
The coach guided us________the task.
She is so intelligent that she can________all the math problems.
Kate,remember________for the sick to cheer them up. A.to sing B.not to sing C.singing
—Do you still remember________with Yao Ming in Beijing? —Yes,of course,three years ago.