You'd better do it ( )your mother did

as
你最好像你母亲那样做。
as是连词，后接句子.your mother did是句子
而like后接短语,比如You'd better do it like that.
when和because意思不对.
希望能对你有帮助.

as

like似乎也可以的

as 其他的都不能和这句话搭配

as
语意应该是像你妈妈一样，所以只能从前两个里面选，但是like不能加句子，而as可以

as 表：如同，象
你最好象你妈妈那样做。

like： （外貌）的象 You are like ypur mother.你长得象你妈妈。