Great attention must be paid ______ agriculture, especially in China, ________ population is the largest in the world.

       A．to be developed ; whose                      B．to develop ; which 

       C．to developing ; whose                         D．to developing ; which

--- Do you have _______ for the party , Mary?

 --- No, we still have to get another five chairs and some fresh flowers.

       A．something                                              B．everything       

       C．anything                                                D．nothing

--- How was the weather then?

 --- Hardly ______ off the plane when it started to rain.

       A．I had stepped                                    B．had I stepped      

       C．I stepped                                          D．did I step

-- Did you go and watch the latest opera?

   --- No．We ______ it , but our car broke down on the way.

       A．must have watched                           B．shouldn’t have watched  

       C．could have watched                          D．needn’t have watched

She always allows the children to voice their opinions , ______ sometimes their opinions are not sound．

       A．so that             B．as though            C．even if            D．in case

When you’ve finished school, don’t forget to come back to visit your school , ___?

       A．do you               B．have you               C．will you            D．won’t you 

Is it the news ______ the milk contains a harmful chemical ______ is being broadcast on TV now?

       A．that; which          B．which; that            C．which; which    D．that; that

Used to TV shows, where everything is quick and entertaining, many people do not have the ______ to read a book that requires thinking.

       A．courage            B．wisdom             C．patience          D．freedom

He made too many mistakes in the exam．To ______ it another way, he failed to pass the examination．

       A．put                       B．place                 C．set                   D．speak

After eggs were found containing toxic chemical melamine（三聚氰胺） , the price of which is discounted ________ it was before.

       A．half as many as                                      B．as half as many  

       C．as half much as                                     D．half as much as