9.They both take turns ______________ ( look after ) the old man.用适当形式填空...非常急..同志们,请给出理由

9.They both take turns ______________ ( look after ) the old man.用适当形式填空...非常急..同志们,请给出理由
9.They both take turns ______________ ( look after ) the old man.
用适当形式填空...
非常急..同志们,请给出理由

9.They both take turns ______________ ( look after ) the old man.用适当形式填空...非常急..同志们,请给出理由
to look after
固定搭配 take turns to do sth