主谓一致的题目

主谓一致的题目
麻烦一定要是确切的答案啊,一定要正确的答案哦,因为这是我一个重要考试的真题,
7.One or two days ___ enough to see thecity．
A.are B.is C.am D.be
我选了A,我觉得我没错哦
13.When and where to build the newfactory
___ yet.
A.is not decided B.arenot decided
C.has not decided D.havenot decided
我选了C答案选A（不是对现在的影响吗,有个yet词在句子中）
16.____ 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
我选了A,
18.The results of the examination___that you
have all made great _____ .
A.show;progress B.shows;progress
C.show; progresses D.shows; progresses
--我选了B,