21.£­What are they doing over there? 

   £­They are arguing_______each other_______what caused Bird Flu.

       A.with; for          B.with; about        C. to; about  D. at; on

22. Go and make yourself look_______before you receive the foreign guests.

      A. smart  B. brave  C. loyal   D. wise

23. In that film, she was_______as a hard-working middle-aged woman.

   A. cast   B. acted C. played      D. thought