有两个原因，可以用first和second吗

I think the pen __ quite smoothly A.writes B.is writing C.can be written D.is written Suddenly ,the fire alarm in the hall ____ ,which made people run out into the street in a panic.A rang up B rang out C reached out D stared upA well-written composition ____good chioce of words and clear organization among other things.A calls on B c The fire alarm gave a loud noise suddenly等于什么 This hand book is ------for us to learn our lessons.A.great value B学生不尽感激! i brought a new pen yesterday afternoon .it _____(write) very well i brought a new pen yesterday afternoon . it _____(write) very well.急! 会德语的同学们进来一下小熊加油 用德语怎么说? I'm sorry to keep you waiting.这是一句什么句式的句子 主谓宾?还是什么如题 1、《天朝田亩制度》的核心思想是（D）A.无处不均匀,无人不温饱B.按照人口平均分配土地C.天下人都是兄弟姐妹D.天下共享天父上主皇上帝大福2、太平天国运动主要的历史功绩是（A）A.加速 帮帮忙回答几道近代史选择题 “住宅用地”和“居住用地”两个概念有区别吗?本人看到一个规划设计院的设计图,上面标示着“住宅用地”=“居住用地”*70%.小弟愚昧,这两个概念的区别? 什么叫一类居住用地 商住用地,商服用地,还有公建面积指的是什么啊? 居住用地问题一类居住用地40.39公顷,可居住多少人?二类居住用地34.32公顷,可居住多少人? Please discuss the questions.同义句转换Please＿ ＿ ＿about the questions. make questions about 的意思 having S.EX before marriage “as long as you love me 出自哪里? love.so_long是什么 意思 before毛意思? before you 什么意思 Before 商业用地和居住用地建筑容积率的大小有什么规定? 居住用地中,最多允许多少或者多大比例从事商业用地也就是说,居住用地有多少或者多大比例的商业用地不超指标. love is kind 这个句子是出自于哪呢？ love is kind是什么意思 谁能解释一下“love is kind”?一个女孩对男孩的回答,请帮帮这可怜的男孩吧~` 已知工业用地面积比绿地面积少42平方千米,这个城区的居住用地面积是多少?居住用地：40%,绿地：30%,工业：16%,其他：14% 1、This dress is nice.Please put on it找出错误改正并说明为什么,怎么错了.2、I'd like go out with my mother according to the newly-made traffiv regulation will grow smoothly and steadily __both countries follow the principle contained in the joint documents.A shall B may C would D should the answer is A,tell me why ,and why not use the others? the answer is A ,tell me why why not use B or CTom___to computer games all day ,___is often mentioned as a negative example on different occasions,so he is a guy worth learning from.A:addicted ; / B:is addicted ,who C:who is addicted,who题目修改 PMP,Tell me the answer and whyYou are a member of PMI’ and work for a Swedish defense systems contractor.Your company is considering submitting a proposal for government contract,and you are the proposal manager.One of the requirements,as noted in