He stumbled(绊倒)on the _______ ground and fell flat on his face.
—What do you think of my new curtain?—Well, it__ the wall perfectly, I think.
— I haven't seen you for ages! Don't you work in Kaifeng?—__ It's years since I worked there.
Mr.White to hospital for an examination yesterday but he was too busy to come.
Modern China is experiencing a completely new period__ respect for science and creativity has become the guiding principle of society.
I won't give you any help __ you tell me the truth.It's none of my business