He did't ____his homework,because he was sick.是didn‘t，不好意思，打错了不好意思，只有do。did 和dose

He did't ____his homework,because he was sick.
是didn‘t，不好意思，打错了不好意思，只有do。did 和dose

do one's homework,做作业!
前面有助动词 did't 所以后面加动词原形 do
这句话的意思是说：因为他生病了,所以他不能做他的家庭作业!

finish.