of the coats made of cotton. They feel comfortable.A. Two-thirds; isB. Two-thirds; areC.

问题补充：

of the coats made of cotton. They feel comfortable.

A. Two-thirds; is

B. Two-thirds; are

C. Two-third; is

D. Two-third; are

答案：

A. Two-thirds; is

(答案→)B. Two-thirds; are

C. Two-third; is

D. Two-third; are

解析：本题考查分数和主谓一致。根据选项可知第一空要填分数的表达，而这个分数的分子是2，因此作坟墓的序数词要用复数形式，可以排除选项C和D。句子的主语是可数名词coats，动词要用are。故本题选B.