I worked on the problem ____ a long time and I worked it out____ myself____ last..A.for; by; at B.in; with; on C.on; by; in D.for; for; at the

The problem is too hard.I haven't ( )the answer A.WORKED ON B.worked for C.worked out D.worked off在括号中填选项 I worked on the problem for a long time and I worked it out by myself at las中文意思 i still remember the time ____ _____ we worked on the farm I worked on the problem ____ a long time and I worked it out____ myself____ last..A.for; by; at B.in; with; on C.on; by; in D.for; for; at the I worked on the problem ____ a long time and I worked it out____ myself____ last.A.for; by; at B.in; with; on C.on; by; in D.for; for; at the I worked out the problem so( )(easy) I believed on matter how hard i worked. _____did you do at home Nothing much .only some school work.what____you?I worked on the farm________my classmates. (1/2)请求帮助…It was on the farm ( )we worked together that i met tom for I'll never forget the day on which I worked with you.I'll never forget the days in/during which I worked with you.I'll never forget the days on which we worked together.我想问的是那个介词的不同 I'll never forget the day on which I worked with you.I'll never forget the days in/during which I worked with you.I'll never forget the days on which we worked together.他们的介词不同的原因 It was on the farm where I worked that I met Tom.其中的where可不可以换成on whick呢?为什么? 英语特长的朋友,麻烦看下这2组定语从句：I will never forget the day on which I worked on the farm.I will never forget the day when I worked on the farm.That was a happy year in which I workde with you.That was a happy year when I wor they worked on the farm all their lifes 英语改错 they worked hard on the farm t_____it was very dark He worked for ORBIS on the plane.的中文是什么意思? 英语翻译Boy 1:Do you think People will have robots in their homes in 100 years?Boy 2:Yes,I do.I saw a robot on TV,and it cleaned the kitchen.Boy 1:Well,I don’t think people will use money.Boy 2:Do you think people will use money.Boy 1:Yeah,prob I __with her last summer,I __with her.A worked ,am getting on well withB had worked,would get on well withC had worked,would have got on very wellD had worked,will get on very well为什么选C