Books _______ for centuries to preserve and distribute information.

Ответы:

+ have been used

− are used

− are being used

− have been using

Решение:

Чтобы правильно выполнить задание, следует знать видовременные и залоговые формы глагола-сказуемого:
have been used – Present Perfect, Passive;
are used – Present Simple, Passive;
are being used – Present Continuous, Passive;
have been using – Present Perfect Continuous, Active.
В данном предложении глагол use следует употребить в страдательном залоге во времени Present Perfect (настоящем совершенном).
Страдательный залог указывает на то, что действие выполняет не сам предмет, он испытывает на себе действие, направленное на него со стороны. Один из случаев употребления страдательного залога – когда важность, значимость имеет само действие, а не его исполнитель; исполнитель действия в этом случае не указывается.
Время Present Perfect (настоящее совершенное) употребляется для выражения действия, законченного к настоящему моменту, но связанного с настоящим, так же, как для обозначения действия, которое началось в прошлом и продолжается в этот момент. В последнем случае обычно указывают период действия посредством предлога for (в течение) или начальный момент действия в прошлом посредством слова since, которое может быть переведено предлогом (с), союзом (с тех пор как) или наречием (с тех пор). Когда действие, выраженное глаголом в Present Perfect, не закончено к данному моменту, а включает этот момент, глагол в Present Perfect переводится на русский язык глаголом в настоящем времени (обычно Present Perfect переводится глаголом в прошедшем времени).
Согласно контексту и правилу грамматики, только вариант ответа have been used является правильным: «Книги используются на протяжении веков для хранения и распространения информации».
ответ тест i-exam

A guide book can be extremely helpful when you’re visiting a place for the first time. Guide books provide loads of practical information, such as the opening times and entrance fees of the main attractions, and often recommend sights to visit and places to stay. They can also provide interesting information about the history of the place and famous people who lived there.
Основной идеей текста является …

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Reading is important. People who don’t read or who read carelessly make mistakes that can hurt others as well as themselves.
Besides being important, reading is fun. In books you can travel all over the world and visit interesting people. You can go back in time, too, or ahead into the future.
Books are friends who are always willing to talk to you.
You must handle books and magazines carefully with clean hands. You must not mark books or magazines that do not belong to you. You must never cut or tear a library book or a textbook.
Don't turn down corners of pages. You must use a bookmark to keep your place.

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I’m fond of reading. In my opinion, books are a source of emotional inspiration and romantic feelings. Reading is very useful, because books enrich our experience with that of the other people. Besides, books help me to continue my own education.
I’m sure that a reader lives a richer life than a non-reader. The time spent on a good book is never wasted. Reading is a rewarding pastime. But some people think that the tempo of modern life is too fast to waste time on reading. They are sure that books have begun to lose their prestige and value. I disagree.

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Information technology (IT) is an important part of the travel business. Almost all suppliers, such as tour operators, airlines, and hotels, have their own website. Customers can find information and make online booking. There are also many “one-stop” websites, like traveleasy.com. These allow people to find all the information they need on one website – for example, the cheapest deals on flights, or hotel accommodation.

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Why Are the British Mad about Harry?
Who has the most recognized face in Britain at the moment? No, it’s not the Queen, nor the Prime Minister, Tony Blair, it’s not even Robbie Williams! The most recognized face 1 _____ to a young man called Daniel Redcliffe. Although he is not generally known to the public 2 ____. Daniel Redcliffe. In fact, some people know his face as being that of. Harry Potter. Daniel Redcliffe is the actor who plays Harry Potter on film and whose face 3 _____ out from a thousand posters across the nation. The image of Harry Potter is so familiar that even people who haven’t read of the books or seen 4 ____of the films know exactly 5 ____ he is and exactly what he looks like.
The phenomenal success of JK Rowling’s Harry Potter books has been one of the most talked about. The big surprise has been how many children have been drawn to the books. The subsequent success of the films and merchandise that goes with them is far less 6 ____, but the fact 7 ____ thousands of children have actually read the original books has been seen as almost incredible. It 8 ____ to be said that many parents and teachers also have been impressed by the books of the Harry Potter series.
Since the 1960s Britain has seen a steady decline* in the 9 ____ of reading amongst school-age children and this has been blamed on television, films, computer games and excitingly presented magazines. The popularity of the Harry Potter series was seen so unusual that many newspaper and magazine articles were written about it to try 10 ______ its success.
*decline – спад, падение