Do you think ______ amazing for Stephen Hawking to achieve so much as a disabled man?A. this B. that C. it
—What is he doing now? —He’s ________ the teacher in class now.
The trees in the school are good for our health. So please don’t ________.
We are so tired(累) these days because we have ________ homework .
—Why do you like dogs? —________ they are very friendly.
My class teacher is very good _____ us, and we love her very much.