请帮忙分析一下这个句子,有关that的使用?

问题描述:

请帮忙分析一下这个句子,有关that的使用?
the * has all along made it clear that it is an internal affair of China to decide on what method to use to resolve the * issue and that we have no oligation to commit ourselves to rule out the use of force .
后半句中“and that...”引导的是否是make it clear 宾语从句,为什么不直接说 we have.,而要加that 呢?

与前面clear后面的that构成并列句型,引导从句,因为是对称结构,引导从句,所以that不能省略