问题描述：
这句话为什么要用ing进行时呢?为什么使用的是has而不是have呢?
With increasing women taking part in full-time jobs,who will take care of their children has become an increasing problem.
With increasing women taking part in full-time jobs,who will take care of their children has become an increasing problem.
问题解答：
我来补答展开全文阅读