问题

The books are usually quite expensive when they first come out, but they ________be rather cheap sometimes

A:must
B:can
C:should
D:need;

正确答案是：

同类题型

Alice was playing in the park while I __________my homework at home.

Is this iPad yours, Jenny —No, it’s_____. ____is on the desk.

Water can absorb and give off a lot of heat without big changes in temperature,thus creating a___environment.

There is no salt left.Jim, would you like to get ________? —OK, Mum!

Where did you find Lily?— It is in the bookstore _________ she is working _________ I found her.