— Have you known each other for long?

   — Not very long, ____ we started to work in the company.

   A. after               B. before              C. when            D. since

—Catherine, I have cleaned the room for you.

—Thanks. You _________it. I could manage it myself.  

A. needn’t do                                        B. needn’t have done

C. mustn’t do                                        D. shouldn’t have done

How ______ you say that you really understand the whole story if you have covered only part of the article ?

A. can         B. must        C. need       D. may

The World Wide Web is sometimes jokingly called the World Wide Wait because it ______ be very slow.

A. should         B. must        C. will         D. can

— I heard they went skating in the mountains last winter.

— It _____ true because there was little snow there.

A. may not be          B. won’t be        C. couldn’t        D. mustn’t be

—Has your father got up?

    —Sorry, I’m not sure. He __________ got up. Please go and see for yourself.

         A．must have B．can’t have C．would have         D．might have

—I don’t think you should use the dictionary while reading newspapers.

         — _____, but I can’t do without it.                

         A．No, I should                 B．Yes, I shouldn’t

         C．No, I shouldn’t            D．Yes, I should

—I can’t find Mr. Smith. Where did you meet him this morning?  

 —It was in the hotel ___ he stayed.

  A. that                    B. where              

   C. which           D. the one

Our math teacher, however, _____ speak English well.?

　　A. doing   B. does     C. is doing     D. was doing

There are five pairs, but I'm at a loss which _____ to buy.?

　　A. to be chosen   B. to choose from?  C. to choose   D. for choosing