In my opinion, mathematics fun, but more than 80% of the group agree with me. A. are; don

In my opinion, mathematics fun, but more than 80% of the group agree with me.
A. are; don’t
B. isn’t; don’t
C. are; doesn’t
D. is; doesn’t

A. are; don’tB. isn’t; don’tC. are; doesn’t (答案→)D. is; doesn’t解析：本题中的mathematics“数学”本来就是以s结尾的，并非表示复数形式，类似的表示学科的名词还有physics, politics, economics, news等，因此其后的谓语动词用单数形式，排除A、C。再看后半句中出现了group这一集体名词。某些集体名词如family, team, group, audience, class, club, company, crew, enemy, crowd, government, party, public等，如果作为一个整体看待，谓语动词用单数，而如果就其中的成员而言，谓语动词则用复数形式，本题the group前有80 percent of来修饰，因此指的是其中百分之八十的成员，故谓语动词用复数。

我学会了