-----Guess what! I’ve passed my oral English test and got A.
----- congratulations. You ____ practiced a lot.
A. must have   B. should have     C. must         D. should

---Isn’t that your teacher over there?
---No, it ______ be him. I’m sure he doesn’t wear glasses.

---I haven’t got the reference book yet, but I’ll have a test on the subject next month.
---Don’t worry. You ____ have it by Friday.

When we worked in the same office，we _______ often have coffee together.

One of the rules is that every student ________ wear school uniform while at school.

—Where did you meet him?
—I met him on a number eleven bus, if you       know.

－ Mum, I’ve been studying all the morning. _____ I play computer games for a while?
－No, I’m afraid not.    

Some young people these days just ______ go out of their homes to contact the real world．

It doesn’t often snow in my hometown in winter, but it ___be rather cold sometimes.

Surely Mr. Peterson ____ have forgotten to buy presents for his beloved family members. After all, it was Christmas!