帮我解释一下这道题： He has a large collection of books _______are written in English.A.many B.many of which C.many in which D. many of them选哪一个为什么?

帮我解释一下这道题： He has a large collection of books _______are written in English.A.many B.many of which C.many in which D. many of them选哪一个为什么? 帮我解释一下“爵士乐” He has been a student.请帮我 帮我解释一下这道关于before long和long before的选择题——Has Bob returned from Japan?——Yes,he arrived two months ago,but it wasn't________ he went to Hong KongA.before long B.long before C.long after D.soon after这道题的正确 请帮我解释一下这三个词（组）的不同用法.have(has)/have(has) got/there be. he was a little bit nervous.帮我解释一下这个句子用法, 请帮我解释一下蒙古女孩名字的意思：拼音（he ri hen） 帮我解释一下“牛顿问题” 帮我解释一下呗!物理 哪位大神帮我解释一下 请帮我解释一下“好自为之” 尊严帮我词语解释一下 帮我详细解释一下好吗? 破镜重圆是什么意思''帮我解释一下 帮我解释一下极光现象! 灌输思想帮我解释一下 哪位大哥帮我解释一下 请帮解释一下这题为什么选 unless ：shall David go to see the film not unless he has finished...---Shall David go to see the film?---Not ____ he has finished his homework.A.Since B.Once C.When D.Unless我懂选unless ,其实是不懂其他