分类：教育/科学-升学入学-中考
问题：英语问题Hedoesn'tknow_____.A.whattos 
He doesn't know _____.A.what to say    B.how to say C.how to sayit   say what
回答：C.how to say it   He doesn't know how to say it.他不知道该怎么说（说些什么）。A错在多了一个it。