Question

She is good ______playing the piano and good her students ,which is good ____the students

A at for to B to to for C at to for Dto at for我选的是第四个，你认为囊

Answer 1

be good at擅长做某事，第一个为at
sb be good to sb.某人对某人好第二个是to
sth be good for sb.某事某物对某人好。第三个是for，因为这个是非谓语从句，主语是主句，非人，所以用for。
我觉得正确答案是c

Answer 2

选c。
good at 表示擅长
good to 对某人很好，善待某人
good for 对。。。有益

Answer 3

good at playing 擅长弹钢琴
good to her student 她对学生很好
good for the student 这样对学生很好

Answer 4

C
be good at 擅长
be good to 对……好

Answer 5

be good at 擅长
sb be good to sb 某人对某人好
sth be good for sb 某物对……有好处

句子翻译：她擅长弹钢琴而且对学生很好，所以这对学生有好处

综上，选C

Answer 6

选 C at to for