The computer plays an important part in our everyday life. It is one of the great【C1】______in the world in the【C2】______century.

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问题     The computer plays an important part in our everyday life. It is one of the great【C1】______in the world in the【C2】______century. It works for us not only at home, in the offices, in big shops,【C3】______at schools. Today it is used【C4】______many ways. It really【C5】______the world large wealth(财富)and happiness.
    The first computer in the world was【C6】______Enid. It was built in America in 1946. It was【C7】______and heavy. 【C8】______it was born, it has been developing very fast. Until now it has gone【C9】______four periods(时期,阶段)and changed a lot. There’re many kinds of computers. Computers are getting smaller and smaller and computing faster and faster. It becomes more and more【C10】______
    The computer can do most of the things【C11】______the people. It can help us to【C12】______about the real world more quickly, to learn【C13】______we want to learn and to think【C14】______ourselves.【C15】______a student in the twenty-first century, you must work hard at it.
【C13】

选项 A、what
B、that
C、which
D、who

答案A

解析 learn后面接的是一个宾语从句,而且连接词在从句中做learn的宾语,所以只能用what,因为that在宾语从句中是纯连词,只能起连接作用,不能做句子成分。
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