Question

12. He feels relaxed and even begins to whistle because   of the distance  

?

covered. 

A.    three fifth; were

B.    three fifth; was

C.    three fifths; have been

D.    three fifths; has been

Answer 1

12.   D考查分数的表达法与主谓一致。three fifths表示"五分之三";"分数/百分数+ of+名词"作主语时，谓语动词与of 后的名词保持数的一致，此处of后的名词distance是不可数名词，谓语动词应用单数，故选D。