be good for,be good at,be good to.

Going to bed early at night _____ our health.
Most of the students _____ English.
I think you should ______ that old woman.

is good for ：对……有好处

are good at ：擅长……

be good to ：对……友好

Going to bed early at night __is good for___ our health. Most of the students __are good at___ English. I think you should __do good to____ that old woman.最后那个是be吗，我总觉得好拗口啊，我觉得do 要好点

be good for 对......有好处 be good with 和......相处得好 be good to 对......友好 be good at 擅长于......

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