---Mrs. Smith, please teach me how to draw on the computer today.

   ---Oh, no. ____________. You have to get familiar with the keyboard first.

A. Think twice before you do       B. All things are difficult before they are easy

C. Learn to walk before you run     D. Don’t count your chickens before they are hatched

．Good job! Not a single mistake ______ in your homework.

    A. you made                       B. made you              C. did you make        D. you did make

If you ______ half an hour every day for English reading, you are sure to improve your reading ability.

    A. set aside                         B. put away               C. take up                                     D. give off

Hi, somebody ______ the window, please. It’s too cold in here.

    A. closes                              B. close                       C. will close                                  D. is closing

．______ you think you can or not, you must finish the project before Friday.

    A. If                                       B. Unless                    C. Though         D. Whether

Recently Shanghai has a lot of visitors, most of _____ come to see the 2010 Shanghai Expo

 being held now.

    A. who       B. whom       C. them              D. they

—I wonder if you are still an employee in that small company?

—Oh, I ______, but now I’m a public servant in a government department.

    A. used to be                      B. have to be           C. used to            D. did

．—John, where are the cookies? Don't tell me you ate them all．

         —_____. I couldn't help it．They were so good．

         A．Yes, I did     B．No, I didn't      C．Yes, I have     D．Why? Sound strange

Mike had to walk home ______ his bike stolen．

         A．with        B．as        C．for      D．since

．So far, several cases of a disease, _____ as H1N1, are reported to have been found in the country．

         A．knowing              B．to be known       C．having known   D．known