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I was really anxious about you. You _______ home without a word.

----I didn’t see her yesterday.
---- Of course, you ____, because he had gone for a trip..

—Who______ it be that is knocking at the door?  
—It ______ be Father, but I’m not sure.

Looking people in the eye ______ sometimes make them nervous and embarrassed．

"In no case ________ you are a Chinese." Dad told me before 1 went to Japan,

Mr. White _________ at 8:30 for the meeting, but he didn’t show up.

A．should have arrived	B．should arrive
C．shouldn’t have had arrived	D．shouldn’t be arriving

. Mary_____ to college last year. Unluckily, she couldn’t take the examination because of a sudden disease.
A must have gone   B can have gone    C should have gone   D could have gone

---- 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

Steve is very strong and healthy. Strangely enough, he ____ have been infected by HINI virus.
A would      B must    C should    D might

It is important to know about the cultural differences that _______ cause problems.