he could have finished his homework,but he c() not tohe could have finished his homework,but he c() not to .根据首字母提示完成填空 怎么写

问题描述:

he could have finished his homework,but he c() not to
he could have finished his homework,but he c() not to .
根据首字母提示完成填空 怎么写

he could have finished his homework,but he c(an) not to