tom came to school late/later this morning.

问题描述:

tom came to school late/later this morning.
late 和later 选哪一个?答案选的是later可是不理解

tom came to school later this morning (than the usual days) .
这是个省略句,省略了比较部分.
但我觉得,用late也没什么大错误.这道题出得有问题.