(2019·陕西名校联盟高三模拟联考卷)Regardless of the feelings underneath our expression, a smile may be able to make us feel better. Various studies have found that smiles can make our mood (心情) better, send pleasure __1__ to our brains, and __2__ our relationship. So to test the __3__， I put smiling on trial.
My smiles often come __4__ when I'm with friends or __5__ someone for serving me coffee, but it's harder the __6__ of the time. While in transit, for example, I __7__ see a smile exchanged between people. On the tube in London, it's almost frowned (皱眉) upon to even __8__ someone in the eye, let alone grin at them.
As a result, I stay stonyfaced when __9__ the city or getting on a train, simply because it's the existing state, and it would be __10__ to do anything else. It's quite possible that my sour __11__ might be having a(n) __12__ on my mood.
Therefore, I tried smiling at everyone I __13__ all day to see if it had any effect on the way I look at life.
My immediate __14__ was that it was awkward. Making an effort as planned to smile suddenly made me feel __15__—which I guess is exactly what it was.
The day __16__ fairly regularly. I got up, made breakfast, and __17__ out for a run. I didn't feel like smiling while panting (喘息) around the park，__18__ I tried my best. I don't think people were expecting me to lock eyes with them and smile while they were also __19__， but I didn't get any reactions that __20__ they were too alarmed by it.
篇章导读：本文是一篇夹叙夹议文。文章讲述了作者就微笑对情绪的作用这一理论进行验证的过程。
1.A.meanings B．competitions
C.signals D．inventions
答案：C 多项研究发现，微笑可以使我们的心情变好，向大脑发送快乐的信号(signal)。
2.A.describe B．improve
C.change D．build
答案：B 微笑可以改善(improve)我们的关系。
3.A.experiment B routine
C.theory D．recipe
答案：C 因此，为了验证这个理论(theory)，“我”进行了关于微笑的实验。
4.A.consistently B．approximately
C.rapidly D．easily
答案：D 当“我”和朋友在一起时，“我”很容易地(easily)就能笑出来。
5.A.begging B．charging
C.blaming D．thanking
答案：D 或是在感谢(thank)服务员提供咖啡时也会很容易笑。
6.A.rest B．late
C.last D．early
答案：A 但是在其余(rest)时间“我”很难笑出来。
7.A.rarely B．directly
C.gradually D．naturally
答案：A 比如，在路上的时候，“我”很少(rarely)看到人们之间交换微笑。
8.A.laugh B．stare
C.look D．shout
答案：C 在伦敦的地铁上，即使是直视某人也是会被嗤之以鼻的，更不用说对着他们微笑了。look sb. in the eye “直视某人”。
9.A.figuring out B．breaking into
C.taking over D．walking around
答案：D 结果，当“我”游览(walk around)城市或是乘坐火车的时候，“我”都板着脸，因为这是现状。
10.A.strange B．disappointing
C.unique D．typical
答案：A 做其他任何事情都是很奇怪的(strange)。
11.A.back B．neck
C.face D．eye
答案：C “我”的臭脸(face)很可能会影响“我”的情绪。
12.A.expression B．influence
C.remark D．focus
答案：B have an influence on sb./sth. “对某人/某事有影响”。
13.A.treated B．met
C.missed D．enquired
答案：B 因此，“我”一整天都试着对“我”遇见(meet)的每一个人微笑，“我”想看看微笑是否会对“我”看待生活的方式有任何影响。
14.A.principle B．explanation
C.reply D．reaction
答案：D “我”的第一反应(reaction)是：朝别人微笑是尴尬的。
15.A.special B．uncomfortable
C.normal D．powerless
答案：B 按计划努力微笑突然让“我”感觉到不舒服(uncomfortable)。
16.A.went B．put
C.ended D．rose
答案：A 这一天都是按常规进行(go)的。
17.A.reached B．squeezed
C.sought D．headed
答案：D “我”起床，做早饭，然后出门(head)跑步。
18.A.but B．and
C.so D．or
答案：A “我”不喜欢在公园跑步喘息的时候微笑，但是(but)“我”尽力了。
19.A.wandering B．chatting
C.exercising D．exploring
答案：C “我”认为人们并不期待“我”在他们也在做锻炼(exercise)的时候和他们四目相对并微笑。
20.A.stressed B．suggested
C.predicted D．demanded
答案：B 不过他们没有做出任何表明(suggest)他们被微笑惊到的反应。
