Was it in 1998,when he was still at middle school,______ this boy became an expert at computer?A.which B.where C.that D.when

When was ___ __ was in 1998 when he was in middle school.that;It.为什么?为什么用It啊? it was sunday morning in may . when he was nearly drowned once .when was( ( )was in 1998 when he was inmiddle school.A.that ,It B.this this C.this it D.that this He was nearly drowned once.-When was ( -( ) was in 1998 ( ) he was in middle school.-He was nearly drowned once.-When was ( -( ) was in 1998 ( ) he was in middle school.我知道答案是that it when 但是为什么最后一个when啊?这不是强调 英语试题He was nearly drowned once.-When was ( -( ) was in 1998 ( ) he was in middle school.-He was nearly drowned once.-When was ( -( ) was in 1998 ( ) he was in middle school.我知道答案是that it when 但是为什么最后一个when啊?这 英语试题He was nearly drowned once.-When was ( -( ) was in 1998 ( ) he was in middle school.-He was nearly drowned once.-When was ( -( ) was in 1998 ( ) he was in middle school.我知道答案是that it when 但是为什么最后一个when啊?这 when did you get to know her?It was in 1998that还是where we worked It was raining hard when the plane a___ in Shanghai When I [ ] [arrive] in Beijing,it was dark when he arrived in new york ,it was rainning? 英语翻译When I spoke it was in a faint whisper. When was it taken When was it built? when was it It was in 2000 when he was in middle school 这个句子为什么不用强调句It was.that结构? Was it in 1998,when he was still at middle school,______ this boy became an expert at computer?A.which B.where C.that D.when -He was nearly drowned once.-When was ( -( ) was in 1998 when he was in middle school.答案第一空为that,第二空为it为什么啊第一空 It was 1969 ________ he was A.that B.in that C.when D.which