It’s very important for a human being to be polite. A. person B. encyclopaedia C. plant
-_____important it is to study English well! Do you think so ? -Yes, I agree with you.
On holidays, they prefer to ______ at home rather than ______.
—Could you help me carry this box? It’s too heavy. —__________.
People should __________ from __________ down the trees to protect the earth.
I don’t think you can finish the work in such a short time, __________?