Mr. Robert is ________ our teacher. He is also our friend.

1—I’m sorry to keep you waiting for me so long.—_______

I won a big prize, an iPad mini2, in our school talent show this year.– ______

Is the boy in white clothes your friend, Kangkang —No. ____ in black clothes is.

When Tim ________ why he was late for school, he just kept silent．