The synonym of “whole” is:

Questões de assuntos semelhantes

• The word breakthrough, on the title of the text, could be best substituted by:  
• In the sentence “the dangerous comets and asteroids which might cross Earth’s orbit” (lines 39 and 40), the underlined word is similar to
• “Nobody”, (line 7), can be replaced by
• As used in (line 16), ‘lead to’ can be replaced by
• Choose the alternative that has the same meaning as the word mandatory in the sentence “She knew she would have to sit a mandatory English...