楼主好,
1.matters 后面是一个定语从句,完整应该是 that were arising from the last meeting.
2.因为时态是过去式
3.I do not know是主句,后面是宾语从句
希望能帮到你^^第一句能转为陈述句吗第二句中那么不是有两个动词了吗 was和arose第三句中what 后面为什么加to当然可以了，如下Let's begin by dicussing matters arising from the last meeting.或者你想一字不差的话就再如下 -，-wecan begin by dicussing matters arising from the last meeting. 我明白你说什么，我给调一下句子的顺序你就明白了，如下It seemed as if a new one arose as soon as one problem was solved.，明白不，分清主干就可以了。 as if...好像...a new one arose, as soon as one problem was solved.解决了一个问题，新的问题又出现了。 what to do 整个是不定式，做的宾语。