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请阅读下面短文,选择最佳答案,将其标号在答题卡上涂黑。
Smiling is the best way of making friends.
When I was thirteen   46   old, my father found a job in the city. So my family moved there. I also came to a   47   school near where we live. My old school was far away. At first, I did not know anyone in my class. I was very lonely  48   I was afraid to make friends with my classmates. I   49   talk to anyone about my problem, and I didn't want my parents to   50   me.
Then one day, something good happened. I was sitting at my desk  51   as usual while my classmates were talking happily with each other. At that moment,   52   came into the classroom. I didn't know who he was. He passed me and then turned back. He looked   53   me and, without a word, smiled. Suddenly, I felt happy, lively and warm. That smile changed my life. I started to talk with the other classmates and made friends. Day by day, I became   54   to everyone in my class.
  55   the smile, I have moved on to a new life. Now, I believe that the world is what you think it is. So smile at the world and it will smile back.

1



A.days B.weeks C.months D.years
2



A.old B.new C.same D.easy
3



A.because B.before C.after D.if
4



A.couldn't B.mustn't C.needn't D.won't
5



A.talk to B.look after C.worry about D.ask for
6



A.early B.unhappily C.quickly D.wonderfully
7



A.a girl B.a boy C.some girls D.some boys
8



A.of B.on C.at D.into
9



A.closer B.older C.cooler D.colder
10



A.Instead of B.Look forward to C.Pay attention to D.Thanks to
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下列物质属于纯净物的是

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关于该实验,有如下结论:
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③实验中一定发生了置换反应;
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