阅读下面短文，在空白处填入一个适当的单词或括号内单词的正确形式。

Nancy and Lynn are twin sisters. They are both clever and beautiful. They are studying insame school, but in different(class). In some ways, they have the same interests. For example, they are both good at(swim) and painting. They both like science. They have many things in common, so people always mistake(把……错当成)(they) for each other. This often makes them(laugh).

 they are twins, they still have (different). Nancy is(outgoing) than Lynn. Nancy likes talking and singing (well) than Lynn. Lynn cares for sports very much. She often plays basketball and soccer her classmates.