All __ is a continuous supply of fuel.

问题描述:

All __ is a continuous supply of fuel.
A,what is needed B,the thing needed
C,that is needed D,for their needs
我选择了B,
不是说一句话不能有两个谓语动词吗?A.C不都是有is了吗?为什么还选择?
B,D为什么不对?

C,that is needed 选择C,ALL 是主句的主语,is a continuous supply of fuel.是主句的谓语部分.that is needed 是定语从句修饰all,is 是从句里面主语that的谓语.B 如果改成the thingS needed 也是对的D的意思上不确切...