A：To wash his clothes．
B：To do the dishes．
C：To sweep the floor．
有以下说法不正确的是（ ）
不礼貌的现象在我们的校园时有发生，请大家把这些不礼貌的现象记录下来，作为自己行动的警戒。
— What were you doing at this time yesterday?
— I _______.
