关于英语的一道语法选择题,The king commanded that enough money ______ to fund the project.A).be collected B).must be collected C) is collected D)can be collected为什么?为什么不选B?

问题描述:

关于英语的一道语法选择题,
The king commanded that enough money ______ to fund the project.
A).be collected B).must be collected C) is collected D)can be collected
为什么?
为什么不选B?

  command后接宾语从句谓语用should be done ,should 可以省略.