Bỏ ngoài nướng trong, ăn ngoài bỏ trong là gì?

17. a dolphin , often called a "porpoise" , is considered to be one of the bright .

A.called        B. considered    C. to be one      D. bright

18 . if she has many homework to do , she won't be able to john the party.

A. many    B. to do       C. won't     D. to join 

32. when / appeared / I / the street / was walking down / in front of me / a woman

(x+1/x)^2 + (x+1/x) - 6 =0