26　in class 1和in a race中的in含义不同

　in class 1 中的in 表示“在……内”，而in a race 中的in 表示“参加”，相当于take part in。

Which class is she in ?她在哪个班？

Which sport was he in yesterday?他昨天参加了哪项运动？

He was in 800-meter race. 他参加了800米赛跑。

She was in a meeting this morning. 她今天上午参加了一个会议。