My sister is good at ___(sing),but she isn't good at ___(dance)

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My sister is good at ___(sing),but she isn't good at ___(dance)
My sister is good at ___(sing),but she isn't good at ___(dance)

My sister is good at ___(sing),but she isn't good at ___(dance)
singing,dancing

singing,dancing

singjing dancing
good at doing sth. 擅长于做某事

第一个空填singing .第二个空填dancing

singing,dancing
be good at doing sth擅长做某事
介词后动词要使用动名词(+ing)形式,at是介词,所以是singing和dancing

My sister is good at singing,but she isn't good at dancing.
Be good at doing sth.

singing
dancing
固定搭配 be good at doing sth 擅长于做某事

singing dancing
at是介词,介词后面动词+ing,
dance要去 e 后 +ing
be good at doing sth. 这是固定的。