When I saw them last time,they were working ___ the farm.A at B in C by D on应该选哪个?为什么?

The farmers ______(pick) apples when I saw them. Last year I saw you off when flowers were in When I saw them last time,they were working ___ the farm.A at B in C by D on应该选哪个?为什么? 同义句转换：When I passed by,I saw them playing football.（改passed by) 当我看见他们时,我无法相信我的眼睛.When I saw them,I______________________. They have run out of their money when I saw them同义句 英语翻译He was in a real state when I last saw him. The last time ___ I saw him was last Friday空里应该填that还是when? When I saw you, who___________you ____________(talk) with?Where __________they___________(play) football when the teacher looked for them? When I visited them last night ,they __ (chat) by the fire. The Greens was at table when I vistied them last night.哪里错了 the blacks (were/are) having dinner when i phoned them last night 首字母填空They were _____(讨论) a Math problem when I saw them初二英语首字母填空1.They were _____(讨论) a Math problem when I saw them.2.The plane_____(碰撞)into the mountains. Last night,i saw ____ enjoy ______at the party.A.her ,hers B.they,them C.she,herself D.them,themselves答案选C为什么? They were ______(砍）a tall tree down when I saw them.这个题,谁若知道就告诉我, peter didn't look well last year when i saw him.he ___ cigarettes then.填cut down on It's almost three years ____ I last saw her.A.since B.when C.that D.after I saw her play when I was