正确形式填空They(spend)all their money,so they have to walk home.

问题描述:

正确形式填空They(spend)all their money,so they have to walk home.

They【have spent 】all their money,so they have to walk home.
用现在完成时,表示 “花光了所有的钱”对现在造成了影响,即 “他们不得不步行回家”.