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 According to the air traffic rules, you ____ switch off your mobile phone before boarding.

A. may                              B. can                         C. would                     D. should

--I'm sorry. I ____ at you the other day. 　　　　　

--Forget it. I was a bit out of control myself.

A.shouldn't shout B. shouldn't have shouted 　

C. mustn't shout D. mustn't have shouted

Thank you for all your hard work last week. I don't think we ____ it without you.

A. can manage B. could have managed C. could manage D. can have managed

 This printer is of good quality. If it ____ break down within the first year, we would repair it at our expense.

A. would                     B. should                    C. could                             D. might

 The doctor recommended that you ____ swim after eating a large meal.

A. wouldn't                 B. couldn't                  C. needn't                   D. shouldn't

 --I don't care what people think.                      --Well, you ____.

A. could                             B. would                     C. should                    D. might

 What do you mean, there are only ten tickets? There ____be twelve.

A. should                    B. would                     C. will                        D. shall

But for their help, we ____ the program in time.

A. can not finish B. will not finish　　　　　　　

C. had not finished D. could not have finished

He did not regret saying what he did but felt that he ____ it differently.

A.could express B. would express　　　　　　　　　

C. could have expressed 　 D. must have expressed

 One of the few things you ____ say about English people with certainly is what they talk a lot about the weather.

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