Tom spends----time studying than his brother but has made---

Tom spends----time studying than his brother but has made-----progress
a. little,great b.less ,greater c.much,great d.more greater
2.I think this lesson is----easier than the last one
a.very b.more c.much d.a lot of
3.I'm sorry to say that you didn't do---in the exam as you have expected
a.as well b.so good c.so better d.as better
请说明理由,谢谢