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It is fashionable to drive a car, but to drive a car is not nearly as difficult as it is imagined on condition that you ________ the specialized rules.

I have never dined with you, sir; and I see no reason         .

       A．how can I know             B．how I ought to know

       C．why shall I know            D．why I should know

I’ve been working for over twenty years and seldom           so tired as now .

       A．I have felt       B．I had felt C．have I felt       D．had I felt

—Be careful not to drop the Tang Dynasty vase .

     —Yes , we can’t be            .

       A．too careful      B．very careful     C．too careless     D．careless enough

—I’m going to the stadium ,but I’m afraid I’m not in the right          .

     —       .Go ahead.

       A．way ; No  B．distance ;No     C．side ;Yes D．direction; Yes

I can’t think why he            that; it was my fault.

       A．would have said             B．should have said

       C．ought to have said    D．might have said

The brake of your bicycle has come loose . You’d better           it .

       A．settle       B．fix    C．pick D．correct

If you are not yet            , you are forbidden to visit this site .

       A．eighteen years               B．a(chǎn)t age of eighteen

       C．eighteen – year-old        D．eighteen years of age

—I thought you were proud of the work I          .

—I’m afraid not .You’d better change it for another.

       A．do     B．had done   C．did   D．would

Every time he tried to start the car, the wheels _____ deeper into the mud.

   A. stayed                 B. sank                         C. fell                          D. dropped