The volunteer is too tired to walk any _____(far)now.

问题描述:

The volunteer is too tired to walk any _____(far)now.

本来可以填farther 或者further 两个答案,但这里只能填further .原因是什么我也忘了.
整句就是:志愿者现在太疲惫了以至于不能再走更远了.