reading前面用什么介词

前面用介词in，例如：

1、He's behind the rest of the class in reading.他的阅读能力不及班上其他人。

2、Children seem to have lost their enjoyment in reading.孩子们似乎已失去阅读的乐趣。

3、He spends at least a part of his time in reading.他至少有一部分空闲时间看书。