When I met Mary in the street,she always___at me.A.smiled B.has smiledC.was smilingD.smiles请问为什么呢?有没有特殊的语法?

I _____ Mary in the street yesterday,we ____each other since i left school.A.met；didn’t see.B.had met；hadn’t seen.C.met；haven’t seen D.met ;hadn't seen. When I met Mary in the street,she always___at me.A.smiled B.has smiledC.was smilingD.smiles 定语从句Yesterday when I met MaryIt's yesterday ＿when＿＿ I met Mary为什么此处用when而不用which?不是说定语从句后要加介词时才用关系副词吗?例如：This is the factory __where___he worked last year因为是work in t I （）Mary in the street yesterday,we （）each other since I left school.【答后给分】.A.met；didn’t see.B.had met；hadn’t seen.C.met；hadn’t seen.回答并附上原因. When I met Mary in the street,she always___at me.A.smiled B.has smiledC.was smilingD.smiles请问为什么呢?有没有特殊的语法? when i ___(walk) in the street,i met her. I ___ Mary in the street yesterday ,we ___ each other since I left school.A.met;didn't see B.had met;hadn't seen C.met;haven't seen D.met;hadn't seen答案上说是C,我觉得应该是D啊?谁能给我讲一下?还有一题：They are sitting _ I met Mary in the street yesterday 改为强调主语I met Mary in the street yesterday改为强调主语的结构 Eventhough I just say her once,I haven't forgot her face.When I met her at first time.I have fellEventhough I just say her once,I haven't forgot her face.When I met her at first time.I have fell in love with her.But my friend told me that his friend 求解英语习题 （从句）Although several years has passed, Mary was still the very lady ____ she was when I met her in ShanghaiA. what B. which C. whom D. that I didn't know he came back___I met him in the street.A.sinceB.when C.until D.after正确答案是： When I met miss li in the street yesterday,I stopped____(talk)to her为什么呀 When I walked in the street,I my best friend.后面是填met还是meeting? I met mr.green when I ___ (walk) around in the garden I s_____her hand when i met her in the street yesterday While I was walking in the street,I met Liu Dehua.转化为I met Liu Dehua while I was walking in the street.while换when, When I first time met him,I she was walking t the zoo when I met her yesterday