______ be Mr．Johnson who is in the office．— No, it _______ be him．I saw him off at the airporthalf an hour ago．

fter the mud-rock flow hit Zhouqu,Gansu Province, many soldiers came to the ______ as many people were trappedunderground.

Do your parents live with you– They _______ to do. But they_______ to living in the countryside now.

You don’t look well! What’s the matter?—My son is _______ to computer games. And I have no idea what to do with it.

Kids will be ______ about everything when they reach a certain age.