in my opinion all mr white______good to his students in his class at present.he is very strict in their study.A did does does B does did do C did does do D did do does选B 谁给我仔细解析下 懵了

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in my opinion all mr white______good to his students in his class at present.he is very strict in their study.
A did does does B does did do C did does do D did do does
选B 谁给我仔细解析下 懵了

正解是C
all 后跟了一个定语从句 all (that ) Mr.white did
主句谓语 是do good to ,用does do good 表示对谓语动词的强调.
翻译,在我看来,怀特先生以前做的一切目前对他班上的同学很有好处.

at the end of sentence it mentions at present, so we gonna use prsent tense. what i guessing the answer is suppose to begin with does. then we can neglect all others selections.:) Hopes my answer works for you.