WORKING ON MATH PROBLEM 中的 WORK为什么要加ING

working on math ,whysics problems The students are working on a math p________in the room. WORKING ON MATH PROBLEM 中的 WORK为什么要加ING ------What are you doing?------I'm ____ the math problems.A.work B.working C.working on D.working of 是in my math还是on my math?I will be hard-working on my math我记得是IN才对呀.它们两个能通用么? he is working on the math project this______week.A.all B.whole C.one D.next men and nations working apart created the problems,men and nations working together sloved the prob A:Let's go to play football B:Sorry ,I'm ( ) a math problem.A working for B working on C work onC work on D worked out 1、I spent half an hour（working on）this difficult math problem 括号里为何填working on 而不是to wo One morning ,we were working on math problems at the chalkboard .Donnie had copiedthe problemsOne morning ,we were working on math problems at the chalkboard .Donnie had copied the problems with pains-taking tidiness . the math teacher gave us some exercises and asked us ______选哪个,为什么?the math teacher gave us some exercises and asked us ______ A. to work them on B. working them on C. to work on them D. working on them 初二一道英语单项选择He is working on the math project this （ ）weekA.all B.whole C.one D.next说明理由哈~·· I spend time as much as I could _____ the math problem.A.work outB.to work outC.working outD.to work on 这句话有没有时间状语?是哪个?“I had been working on math for the whole afternoon and the numbers swam before my eyes. i am working on working on computers 翻译 in working days ,还是on working days We,have,math,on,Friday.