the rich__always happy.
问题描述：
the rich__always happy.
1.The rich__always happy.
A.isn't B.aren't C.wasn't D.weren't
2.Ninety percent of the work__been done.
A.is B.are C.has D.have
3.Some folk__never satisfied.
A.is B.are C.seems D.feels
4.Many a student__never satisfied.
A.is B.are C.seems D.feels
5.Steam and ice__different forms of water.
A.is B.are C.was D.were
6.One dollar and eighty-seven cents__all Della had.
A.is B.was C.are D.were
7.All__here now.
A.is B.are C.was D.were
答
BThe rich指富人们
C百分比后单数
Bfolk=people
Amany a修饰名词,动词用单数
A
A这些钱是（is）她有的
B 这里all指所有人