下列句子中，加点的成语使用恰当的一项是（ ）

Mothers holding jobs outside the home should have _____ schedules to make it easier to care for their children. [ ]

I turned to the headmaster and he promised todo everything _______ his power to help me out

Mr. Smith, Can you give us some advice onhow to learn English well’–Remember, Nothing can be learned well______hard work.

Are you going to Tibet for vacation —Yes. I want you to ________ me with someinformation about it.