4．A.gift C．meal
B．flight D．hotel
D 解析：根据后文的how to spend a night became a problem可知，作者没有钱住旅馆(hotel)。
5．A.calm C．nervous
B．sad D．eager
B 解析：根据后文的trying to fight back tears可知，作者很伤心(sad)。 6．A.noticed C．understood
B．attracted D．recognized
A 解析：根据语境可知，这里是说一位妇女注意到(noticed)作者悲伤的样子。 7．A.away C．back
B．off D．down
C 解析：那位妇女说她愿意带作者回她家住，并会在第二天早上再将作者送回(back)机场。
8．A.protect C．believe in
B．educate D．look after
D 解析：根据语境可知，那位妇女家里有两个孩子要照顾(look after)。 9．A.failed C．refused
B．helped D．managed
C 解析：尽管那位妇女家里有急需照顾的孩子，但作为一个母亲，她也不愿(refused)留作者一个人在机场过夜。
10．A.led C．showed
B．treated D．pushed
B 解析：根据语境可知，那位妇女带作者回到她的家中并招待(treated)作者吃了丰盛的饭菜。
11．A.clean C．share
B．check D．decorate
C 解析：根据后文的so that there was an extra room for me可知，那位妇女让自己的孩子共用(share)一间卧室，以便让出一间卧室给作者住。
12．A.after
B．unless
C．since D．because
A 解析：根据语境可知，那位妇女先将自己的联系信息给作者，并让作者给她的妈妈打电话，让她的家人放心，然后才安排作者住下。故after符合语境。
13．A.call C．remind
B．thank D．persuade
A 解析：根据后文的let her know where I would stay可知，那位妇女让作者给她的妈妈打电话(call)，让她妈妈知道自己会待在哪里。
14．A.crazy C．boring
B．busy D．healthy
B 解析：根据语境可知，现在作者自己也有了孩子，过着忙碌(busy)而又幸福的生活，所以她更加感激(appreciated)多年前那位有着两个孩子的母亲对自己的无私帮助。
15．A.admitted C．praised
D 解析：参见上题解析。 16．A.friend C．passenger
B．stranger D．tourist B．concerned D．appreciated
B 解析：根据上文可知，那位热心帮助作者的妇女以前不认识作者，是个陌生人(stranger)。
17．A.pain C．trouble
B．pressure D．danger
C 解析：根据上文可知，尽管家里有两个孩子急需照顾，那位妇女还是愿意不怕麻烦(trouble)，给予作者帮助。
18．A.minding C．regretting
B．avoiding D．considering
D 解析：根据上文的my family faced a really tough situation可知，作者家境窘迫，她那时正考虑(considering)辍学。
19．A.plan C．choice
B．difference D．decision
B 解析：根据下文可知，那位妇女的善意行为对作者产生了很大的影响。make a
difference符合语境。
20．A.continue C．repeat
B．forget D．ignore
A 解析：根据后文的At last, I got a doctor degree.可知，那位妇女的行为使得作者有勇气继续(continue)自己的学业，最后作者取得了博士学位。
Ⅲ 语法填空
Do you know what the number one killer in the United States is? According to researches, heart disease 1.____________ (think) to cause the most deaths in the U．S. With all the junk food that is available nowadays, heart disease has turned into the biggest problem today.
So what’s the 2.____________ (solve) to this problem？The answer is simple. We just need to eat healthier food and the risk of heart disease will be 3.____________ (great) reduced.In fact, we can add about 15 years to our lives by just 4.____________ (change) a few things in our diets.
To have a healthy body, we need to eat more raw(未经加工的) foods, and most importantly，vegetables. 5.____________ reason why people in the past 6.____________ (seek)ways to cook food is that the food was often 7.____________(dirt). In African villages, people must go to rivers and get water 8.____________ them. They boiled it first 9.____________(kill) bacteria and then they would drink it. Nowadays, the food we get from stores is basically edible(可食用的). It is very safe for us to eat already, 10.____________ means we are not taking any risks if we have raw food diets.
【解题导语】 本文主要介绍了从饮食上减少心脏病的有效方法。
1．is thought 解析：考查动词的时态和语态。heart disease和think之间是被动关系，且是一般性的表述，因此用一般现在时的被动语态。
2．solution 解析：考查名词。根据前面的冠词the可知，此处用名词solution作表语。 3．greatly 解析：考查副词。修饰动词reduced，因此用great的副词形式，意为“极大地”。
4．changing 解析：考查非谓语动词。by是介词，因此后面用动名词作介词的宾语。 5．The 解析：考查冠词。reason在这里是特指，why引导定语从句，因此用定冠词the。 6．sought 解析：考查动词的时态。in the past表明此处应该用一般过去时。 7．dirty 解析：考查形容词。系动词was后面应该接形容词作表语。 8．from 解析：考查介词。这里表示“从河里取水”，因此用介词from。
9．to kill 解析：考查非谓语动词。他们把水煮开的目的是杀死细菌，因此这里用不定式表目的。
10．which 解析：考查关系代词。which引导非限制性定语从句，先行词是前面整句话，which在句中作主语。
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