1.We have to put forth efforts.
2.It has nothing to do with you.Take care of your business.
3.Peter's suggestion doesn't work on us.
4.I am kind of worried about the interview.
1.Scientists wordwide are working in/at unraveling the mistery of AIDS.
2.Though the weather is bad,the sport meeting will go ahead as usual.
3.Any thing goes against the natural law would suffer severe punishment from nature.
4.AIDS is short for acquired immunodeficiency syndrome.
*第一题的work on后面只可以加sb/sth,
所以改成work in/at doing sth.