英语、数学大师请进!（最高追加为分）

英语、数学大师请进!（最高追加为分）
（我以人格担保,答对第六道再追加100分）
1.比较no one,nobody,none的异同
2.How do you find your new classmates?
Most of them are kind ,but＿＿is so good to me as Bruce.
A.none B.no one
3.He began to take political science＿＿only when he left school.
A.carefully B.seriously
4.At the end of the meeting,it was annnounced that an agreement had＿＿.
A.reached B.been reached.
5.Human facial expressions differ from those of animals in the degree＿＿they can be controlled on purpose.
6.已知P 为等边ΔABC中一点,PD⊥AB ,PE⊥BC,PF⊥AC.求证：ΔADP、ΔBPE、ΔCPF的面积和为ΔABC面积的一半.
第五题：A.with which B.to which C.of which D.for which
这才是最重要的！