pretend to do 和pretend to be doing 有什么区别?

问题描述:

pretend to do 和pretend to be doing 有什么区别?
When the father came home,the naughty boy pretended___ his homework?
A to do B to be doing C doing D being done 应该选哪个呢?

B
pretend to do 假装要干某事
pretend to be doing 假装正在干某事
爸爸回来时,这个调皮的男孩假装(在做)他的作业
由句意选B