44.  A. If you don't know what is good for you,why don't you try it on?

   B. If you don't know what is good for you,why              it on?

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                               B 

      When your grandparents were young,the world was very different. People did not have computers or cell phones (手機(jī)) that we have today to communicate with each other. These things did not appear yet. It took longer for people to get news from each other. Today there are more ways of communication which make it possible for people to get in touch with each other at any time. 

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      People began to use telephone in the late 1800s.

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      Cell phones can do many things. We can carry it with US anywhere we travel. Cell phones can even let you take pictures,and can send these images to other cell phones.

      Although new communicative ways help US stay in touch with each other,many people still enjoy sending and getting letters. With so many ways to communicate,iteasy to find your favorite way to stay in touch.

根據(jù)短文內(nèi)容，選擇正確答案。

(   ) 31. When your grandparents were young,         .

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