（2013·安徽卷)From space, the earth looks blue. This is about seventy-one percent of its surface is covered by water.
| A．why | B．how | C．because | D．whether |
My uncle was poor but he _______ often dress up as a rich man
| A．would | B． might | C．should | D．Must |
A man landed on Mars? You must be joking. It ______ be true.
| A． mustn’t | B．can’t | C． needn’t | D．won’t |
It’s nearly time for class to start. The teacher _______ be here soon.
| A．must | B．need | C．should | D．Can |
It was playing computer games that cost the boy plenty of time that he ______doing his lessons.
| A．might have spent | B．must have spent |
| C．ought to have spent | D．must gain |
------We want someone to design the new art museum for us.
------______the young fellow have a try?
| A．May | B．Shall | C．Will | D．Need |