297.Have all the important letters been delivered at the first time?I'm sorry._______ only 40% of them.
A.It is
B.They are
C.There are
D.It has been
298._______ of the land in that district _______ covered with trees and grass.
A.Two fifth;is
B.Two fifth;are
C.Two fifths;is
D.Two fifths;are
297.答案是A;
此处实际上考查的是强调句,强调的是数词。
298.答案是C;
表示几分之几时,分子超过一,作分母的序数词要加s,此处五分之二代表的是不可数名词Land,此处的分数是单数。