请教三道初中英语题目.谢谢.

问题描述:

请教三道初中英语题目.谢谢.
1.Judy seldom goes to the gym to do some exercise,________?
A.doesn't she B.does she C.isn't she D.is she
2.It's said that Shen Nong was the person ________first discovered tea in history.
A.whom B.who C.whose D.which
3.This pair of glasses_______very beautiful.Can I _______?
A.look;try it on B.looks;try on it C.looks;try them on D.look;try on them
这几题是我做错的,我依次选的是A DA,正确答案是B B C
请帮我分析一下正确答案,十分感谢?

第一题答案是B,seldom是否定意义的副词,所以后面用肯定.
第二题答案是B,先行词是表示人的"person",在定于从句中做主语.
第三题答案是C,前半句虽然有glasses,不过主语pair是单数,所以还用looks;后半句try的宾语应该是眼镜glasses,所以用复数.