请问为什么用during which period Qian Xuesen was in America from 1935 to 1955,______________the research into jet planes.(concentrate)这是一个完成句子的题目.during which period he concenteated on

请问为什么用during which period Qian Xuesen was in America from 1935 to 1955,______________the research into jet planes.(concentrate)这是一个完成句子的题目.during which period he concenteated on I remember the days (during) which I lived there.为什么要用during老师解释说要看先行词the days 来搭配,所以用during但是为什么不能说是看从句中的lived来搭配in which呢 the second world war (during which )millions of people were killed ended in1945为什么填during whichthe second world war (during which )millions of people were killed ended in1945为什么填during which 我们老师说不存在during which这种 the museum,______we visited during a trip,is one of londonsattractions为什么用which 不用 that? they stayed with me for two weeks,____they did all the houseworkA、at which B、during when C、during which D、during that time我想知道为什么不能用at?为什么要用which?不能用when吗?they did all the housework句子结构不是完 they stayed with me for two weeks,____they did all the houseworkA、at which B、during when C、during which D、during that time我想知道为什么不能用at?为什么要用which?不能用when吗?they did all the housework句子结构不是完 during which的问题presentations are events duiring which awards and gifts are given这里的during which是什么意思,为什么不用when,还能再举几个这种句子吗 一道关于定语从句的语法题.I'll remember the time ____ we spent together in the UK.A,when B,at which C,during which请问老师为什么?要怎么判断是用关系代词还是用介词加关系副词呢?什么情况下要用介词+关系 the fire lasted for 20 days,(during that time)the whole forest was destroyed.为什么不能填during which time you can come to see me from one to two o'clock,___ I will stay at home,A,during the time B,during that time C,during which time D,during which为什么D不对呢? Don't talk during/while eating.请问选哪一个 为什么? 英语Jane spend three years in China,during which time she was learning ChineseJane spend three years in China,during which time she was learning Chinese.我就是搞不懂,为什么during which =when后还要加time, of which和during which的区别 i often think of my childhood,during( )I live on my uncle's farmi often think of my childhood,during( )I live on my uncle's farm为什么不能填when 而要用which? during which timeThey stayed with me for two weeks,_______ they drank all the beer i had .A.which B.which time C.during which time D.during which为什么不选D.是不是during 连接表时间的定语从句就是这种情况下后面只能用which 英语翻译请问为什么用and which 不用and after 共四个选项,另两个是after which ,which after 请问This is the ship (in which) we crossed the Pacific.为什么用in which 而不选by which The train will come in an hour;____we can have lunch.A during which B meanwhile C for the meanwhile D when请问选哪一个?为什么呢?为什么试卷上给的答案是A呢?