请英语高手拔刀相助阿

求英语达人拔刀相助。~

解题思路：
先第8题，比较简单，一看上下文，这个年轻人不像他弟弟，他喜欢音乐。Unlike his brother, this young man took an interest in music.按照意思，只有unlike比较妥帖。
再第9题，Passengers must check in at the airport an hour before the plane leaves.只有chenk in 检查比较合适机场登机。
再第10题，If you really want to drop this bad habit, 如果你觉得你真的想改掉这个坏习惯，那么下面半句也就简单了，就要知道真正是你正确要做的，be determined to。
下面第11题放一下，先12题，when you are walking alone in the deep night.你半夜一个人走路要如何？毫无疑问，stay alert，保持警惕。

留下最后2个alternative to,和stand treat,
alternative to要跟宾语的，第11题不合适，第11题应该是Would you go to lunch with me? I'll stand treat.你要和我一起吃午饭？我做东。stand treat，是请客，东道主的意思。

留下最后一个就是第7题，I had no alternative to staying at home because I have no money.我没钱所以我没选着只能呆在家里。

In the international economic and trade activities, commercial contract is an important basis for the legal documents, business English language has become indispensable communication tool, it is also the starting point in English economic and trade contracts. More and more fans of the English and the law also want to familiarize themselves with the contract in English, to accurately understand, translate, prepare English language contract. China's accession to this demand with the WTO (World Trade Organization) and the surge in commercial contracts in English to solve problems more urgent desire will follow. A wide range of international business contracts, covers a wide range and complexity. The nature of foreign trade such contracts are required in English and Chinese versions, so most of the need for translation. Business contract has its own characteristics, that is, be rational, normative, and professional. Business Contracts made on the high quality of the translation requirements, but also increased its difficulty. In this paper, the accuracy of commercial contracts in English, rigor, standardized and common errors in translation and its countermeasures are briefly analyzed and discussed, and analyze the translation should pay attention to.

声音以压力波的形式传播.这些波是由空气中的粒子振动产生的,即--空气粒子不断移动到一个新的平衡位置.这些粒子移动的时候会撞击其周围的粒子,而周围的粒子又会撞击周围的粒子,如此不断.声音以这种方式在大气中传播.当空气粒子移动产生的压力波撞击到耳鼓膜时,使耳膜发生振动,声音就被听到了.声音的这种物理属性可以用三个基本参量来衡量:大小、频率和周期。尽管声音的这些参量可以直接被测出，但是从环境的不确定性和人们听声音的方法这两方面来看，要作出有效的测量是很复杂的。

以压力波浪的形式，声音被传送。 这些
波浪由微粒空气是，空气微粒的动摆
创造被偏移从和返回到
平衡位置。 当微粒被偏移，他们碰到
碰到其他等等的周围的
微粒。 如此，声音通过大气被传送。
声音听见，当被偏移的空气微粒压力
波浪碰撞鼓膜时，造成它振动。
声音的有形资产可以被测量用三种
基本成分的术语： 巨大、频率和期间。

虽然这些组分可以直接地被测量，
声音有用的措施由人们听见
声音的环境变量和方式复杂化。

声音是以压缩成波的形式传播的。空气粒子的振动产生了波，也就是说，空气粒子不断地被从原始平衡位置所置换。当这些粒子位置转移时，它们相互撞击各自周围的粒子。通过这种方式，声音在大气中得到传播。当被压缩的波振动到人们的耳膜时，就可以听到声音了。声音的物理属性可以用它的三种基本特性来作为测量标准，量级，频率，持续时间。尽管这些属性可以被直接测量，但是声音的测量是很复杂的，它会受到环境变量以及人们听声音的方式的影响。

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