9．The mother kept warning her son to ________ trouble，but today he broke the window of their neighbour again.
A．keep out of B．break away from
C．hold back from D．get rid of
解析：keep out of置身……之外，不卷入；break away from脱离；hold back from犹豫不定，控制；get rid of摆脱，除去。根据句意：妈妈一直告诉她儿子不要惹上麻烦，但是他今天又把邻居家的玻璃打碎了，可知答案为A。
答案：A
8．The interview will give you a chance ________ an impression of the company.
A．to form B．form C．forming D．having formed
解析：句意：面试将给你们提供一次机会，让你们对公司形成个印象。form形成，在句中不定式短语作后置定语。chance to do sth.表示“……的机会”。
7．Letterboxes are much more ________ in the UK than in the US，where most people have a mailbox instead.
A．common B．normal C．ordinary D．usual
解析：句意：与美国相比，英国的信箱更常见，在美国大多数人都有邮箱。common常见的，与rare“罕见的，珍稀的”相反；normal与norms(规范、标准)同源，意为“符合标准的”；ordinary一般的(与special“特殊的”相反)；usual：customary符合风俗的。综上所述，A为正确答案。
6．You should ________ yourself out of their quarrels.
A．prevent B．keep C．put D．take
解析：keep...out of表示“不让……进入；使……不介入”。
答案：B
5．We have ________ the conclusion that he is honest.Which is WRONG?
A．reached B．drawn C．arrived at D．came
解析：come为不及物动词，“得出结论”可以用come to the conclusion。
答案：D
4．The total cost of their trip to Canada ________ $5,000.
A．added up to B．added up C．added to D．was added up to
解析：add to意为“增加”；add up to意为“总计；加起来到”，不用于被动语态。
3．The country life he was used to ________ greatly since 2004.
A．change B．has changed C．changing D．have changed
解析：句中的he was used to作定语从句，修饰前面的country life。句意是“他习惯的农村生活从2004年开始发生了很大的变化”。
2．It’s clever ________ to make a mistake and correct it in no time.
A．for her B．of her C．by her D．by herself
解析：句意：“她犯了错误立即给予纠正，太聪明了。”考查动词不定式的逻辑主语。she is clever...，显然答案是B。
1．I liked the picture ________，the more I looked at it.
A．better B．the better C．best D．the best
解析：“the+比较级．..，the+比较级”结构中，比较级若置于句中，省略the。
10．There’s a ________(留言)from Karen on the phone.
答案：1.method 2.equipment(apparatus) 3.Gravity 4.expands 5.electricity 6.rust 7.reacts；oxygen 8.astonished 9.lecture 10.message