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What were you doing _____ the accident happened?                                                   

       A．while               B．until                    C．because          D．when          

My friend is angry with me．What should I _____ to him?                                          

       A．speak                B．talk                    C．say                    D．tell              

You should tell him _______ different clothes．                               

       A．getting                B．to get               C．not get                D．get

Children might find ____ difficult to plan things for themselves．                                 

      A．that                  B．this                   C．it                    D．them

He doesn’t have any money,______．                                                                       

       A．too                B．a(chǎn)lso                     C．either                  D．a(chǎn)lready

I think there will be _____ people and ______pollution.                                        

A. less, fewer      B. less, more          C. fewer, less                 D．fewer, fewer

She plays ______ today．                                                               

       A．the football         B．the tennis          C．the guitar           D．piano

All of us were listening to the news _____ silence.                                                      

    A．on                 B．in                    C．a(chǎn)t                       D．to

It may take _________ years to make such robots ．                                                 

       A．hundred of       B．two hundreds     C．hundreds of       D．hundred      

There will be less ________．                                                                                  

       A．trees                   B．people                C．pollution            D．cars