reading前面用什麼介詞

前面用介詞in，例如：

1、He's behind the rest of the class in reading.他的閲讀能力不及班上其他人。

2、Children seem to have lost their enjoyment in reading.孩子們似乎已失去閲讀的樂趣。

3、He spends at least a part of his time in reading.他至少有一部分空閒時間看書。