英语选择题（初中的）要解释题怎么做的！！（5）

Question

What'on the table?
There ____a knife and a fork
A.seems to be
B.seem to be
C.is seeming to be
D.are
答案是A，为什么不能是B？

Answer 1

因为后边是a knife,是单三，所以要加s，选A

Answer 2

桌上有一副刀叉，所以是单数

Answer 3

因为后面的词是单数，所以谓语动词也得用单数。