21£®-The WHO expert points out that the H₁N₁ flu remains a constant threat to the health state of the whole world.

    -          . It’s really a serious problem facing us.

       A£®Sorry, but I cant                                  B£®No, I agree with you

       C£®It sounds a good idea                           D£®I can’t agree mo

22£®      new policy made by China’s government will have     great effect on agricultural development of China in the future.

       A£®The; the              B£®A; the                 C£®The; a                 D£®A; an