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?

pretend to be doing 是强调不定式的动作正在进行的过程中.
pretend to do是强调假装要做某事,而不一定正在进行或者是已经发生.
这里的"pretended"是过去式，并不是过去进行时“was pretending”，因此含以上说应该是正要假装去写作业，所以我的意见是选择A

选B

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

2. pretend的主要用法（也就是考点）如下：
1）pretend to do sth
该结构有如下三种形式：pretend to do sth（一般式）；prentend to be doing sth（进行式）；prentnd to have done sth（完成式）
如：I pretend to be sleeping when my parents came in.
He pretended to be friendly with me.
He pretended to have been abroad.
2) pretend + that从句
如：He pretended that he was innocent.
3）adj.假装/假想的
如：Don't be afraid of a pretend problem.