______ your sister ______ in Greener China for a long time—Yes.She joined it five years ago.

I can judge that he is very________from the________look on his face. [ ]

Are you still busy?— Yes, I _______________ my work, and it won’t take long

Guess what! Susan’s 9－year－old brother managed to solve the maths problem by________.

busy schoolwork, the children also have totake arts, music and sports classes in their free time— I wonder what they will become