He spent a lot of time _____(take care of ) his old grandmother

问题描述:

He spent a lot of time _____(take care of ) his old grandmother
我是一个学生.因还有很多问题不能立即选择答案.

taking care of
spend+ 时间或金钱+ (in) doing sth.
spend +时间或金钱+ on sth
上述两个短语均表达花时间或金钱做某事