–I like English best. What about _______?–He thinks science is very interesting. His favorite subject is science.

 —You look unhappy .  What’s wrong ?—I find ____ difficult ______on well with my classmates

—Sonia, is this your dictionary?—Oh, no, it’s not ______. Ask Li Lei, he is looking for ______.

There are two dogs in my family. One is white,_____________ black. 

          is an American girl，and          name is Mary.