—I hear you have moved into your new house. Congratulations !—Thanks. I especially like my study _______ is big and bright.
David usually takes _______ walk for an hour after dinner.
The population of the world still now.
— Excuse me. Is the library open all day? —. Only from 8 a.m. to 4 p.m..
Keep off the drugs(毒品), you and your family will be in great danger?
— May I come in? I'm sorry I am late. — Come in, please. But could you please tell me ?