Judge the following items according to the text.
In the sentence “Research has demonstrated its critical role in memory consolidation” (l.20 and 21), the pronoun “its” refers to “Research”.
A palavra there, na linha 38, está se referindo a: 
Assinale a alternativa que preenche corretamente a lacuna da linha 46, e que significa: além disso. 
O prefixo un-, presente em unauthorized (l. 16), também ocorre, com o mesmo sentido, em: 
No segmento: ... many of them operating in violation of ... (l. 30-31), a palavra them está se referindo a 
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: Read the dialogue in the picture. Choose the option to fill in the blank.
