题干
Times magazine says that smart Lego has become one of ________ favorite toys.（）
A：child
B： children
C：children's
答案(点此获取答案解析）
C
Times magazine says that smart Lego has become one of ________ favorite toys.（）
A：child
B： children
C：children's
=(－2,1)，
=(－3，0)，则