哪位亲会改写同义句~时间紧迫!都是初一课程.

哪位亲会改写同义句~时间紧迫!都是初一课程.
1.The black sweaters cost Nancy 8 dollars.
Nancy _______8 dollars on the black sweaters.
2.I like Maths better than English .
I _____ Maths ______ English.
3.I have spent two years on this research.
It _____ two years ______me to finish this research.
4.When will they finish their meeting?She wanted to know.
She wanted to know _____ their meeting ______ ______ over.
5.She did her best to study English well.
She ______ her best to study English well.