when the book was published, he ___ the most popular writer of the time.A became B had become但是英语老是说是B,我都搞糊涂了

when was the book published? When was the writer ofthe book b____? reading,was,when,took,off,boy,a,the,book,ufo,the when i was young ,i have read the book for many times这个句子对吗?为什么? The book was written in 1946,__the education system has witnessed great changes.Awhen Bsince when when i read a book,I was actually talking to the w()急求、、、、、 the book was bought yesterday. My sister was reading a book while she was listening to the radio能不能用when 代替 while I bought the story book when I was ten.(改为同义句)I______the story book____I was ten. There was a big k___ on the door when I was reading a book in my study. 英语同义句转换 My father was reading a book when I came in the room._________________,My father was reading a book when the boy was The book was written in 1946,the education system has witnessed great charges.The book was written in 1946, the education system has witnessed great charges.A．when B．during whichC．since then D．since when ( )The book was written in1946,_____ the education system has witnessed great challenges.( )The book was written in1946,_____ the education system has witnessed great challenges. A.when B,during which C.since which D.since when 答 put back the book---it was when you leave the reading roomA as B there C where D like The book was written in 1946,since when the education system has witnessed g为何不选during which When Icame into the classroom with some story-book,the class_____happy.A.were B.are C.was D.i 改错：One of the men held the opinion when what the book said was right.答案是将when改为that,为什么?