问题

Why, my new computer is rubbish! Five hours has passed and it still hasn’t finished the downloading.—Don’t worry. You know, sometimes the Internet ________ be very slow.[ ]

A: can
B: may
C: should
D: must

正确答案是：

同类题型

It is the protection for the trees___________ really matters, rather than how many trees are planted.

My family has two dogs. One is white, _______ is black.

help you, Madam —-I’dlike to have ______ those eggs

you like tea or coffee–_____, thank you. I’ve just had some water.

When Peng Liyuan stepped off the plane in Moscow, the whole world wanted to know ________ dressed the elegant first lady