The adjective best (l. 20) is the superlative degree of 
Fill in the blanks with interrogative words (WH-questions)
A. ____ was Voyager 1 sent into space? Thirty-six years ago.
B. ____ was Voyager 1 sent into space? To study other planets.
C. ____ is it from Earth now? Twelve billion miles.
D. ____ is it expected to last? Ten years at the most.
According to the text, the correct sequence, from top to bottom, is
Considering vocabulary used in the text, the only word or expression which is not correctly defined on the right is in alternative 
Considering verb forms used in the text, its correct to say: 
Fill in the parentheses with T (True) or F (False). About the OPHONE, its correct to say:
( ) Its already on the market in all of Europe.
( ) Its a special application that will make it possible to communicate smells through smartphones.
( ) It will be able to transmit all kind of scents only to short distances.
( ) Its supposed to work the same way that sounds and images are transmitted.
According to the text, the correct sequence, from top to bottom, is
The text says that 
As far as the future success of the OPHONE is concerned, professor David Edwards feels 
According to the text, its difficult for most people nowadays to have a healthy lifestyle because they 
Fill in the parentheses with T (True) or F (False). In his book, The Slow Down Diet, Marc David encourages us to
( ) avoid eating junk food.
( ) really enjoy every meal.
( ) skip meals so as to lose weight.
( ) take our time while were having a meal.
According to the text, the correct sequence, from top to bottom, is
we not only lose most of the pleasure [ ] but also damage our health. (l. 5-7)
In this sentence, the words in bold, not only but also, express
