您好，请问下面这道题选什么？原因是什么？
In my opinion, all Mr White _____good to his students in his class at present .He is very strict in this study.
A,does does does B.does do do C.does does do D. did do does

选C.does does do.
all Mr White does 指 all that Mr White does 怀特先生所做的一切.
do good to 指:对...有好处.
如果要对一个动作进行强调,在这个动词前加do.
do do good to 指确实对...有好处.而all Mr White does作为一个整体,后面谓语动词要用单数,所以是all Mr White does does do good to his students.(怀特先生所做的一切确实对他的学生有好处)

do 在句中加强动词肯定的语气.
eg: He does look tired.他确实显得很疲倦.
She did write to say thank you. 她的确写信向你道谢了.
Do shut up! 住口!