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  3. Phone books have white, blue and yellow pages. The white pages list people with phones by last name. The blue pages contain numb

Phone books have white, blue and yellow pages. The white pages list people with phones by last name. The blue pages contain numb

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问题     Phone books have white, blue and yellow pages. The white pages list people with phones by last name. The blue pages contain numbers of city services, government services, and the public schools. Business and professional services are listed in a special directory — the Yellow Pages.
    The area covered by one area code may be small or large. For example, New York City has one code area, but so does the whole state of Oregon. There is an area code of map of the US and Canada in the front of the white pages.
    Pay phones have numbers in the US. This means you can call a friend at a phone booth. Or if you are making a long distance call and run out of money, give the number on your phone to the person you are talking to. Then hang up the receiver and they can call you back.
    If you make a long distance call and get a wrong number, call the operator and explain what happened. This means that you can make the call again to the right number without having to pay more money; or you can have the phone company mail you a credit coupon that has the same value as the phone call.
    Some companies advertise a service called WATS. You can dial a special number without a long distance charge. These are called "toll free numbers" and the area code for all of them is 800. WATS means Wide Area Telephone Service.
The phrase "toll-free numbers" means______.
选项 A、an area code
B、a telephone service
C、a free long distance call
D、WATS
答案B
解析
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