Mr. Smith was ________ UNICEF officer. He came to the village and changed the poor girl’s life.
-Two hundred yuan for such a T-shirt! You ______ be joking!-I’m not joking . It’s made of silk.
-Which do you prefer, a CD player or a walkman?-______. I prefer a portable computer.
-This is a useful dictionary, I think.-So it is, and it’s ______ unusual one.
It will be 2 years _______ we see each other again.
The teachers hope all of us can hand _______ our homework _______ time every day.