Why did NASA's website crash in 2012?

Mark the letter A, B, C or D to indicate the sentence that is closest in meaning to each of the following questions.  

Choosing a suitable career is really important to teenagers.

If you haven't been careless, you___________ 

Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29  

      Crocodiles are the world's largest reptiles. Some species of other animals have become (25) ___________ but the crocodiles have not experienced such a fate. All 23 species of the crocodiles are still surviving. There are two types of crocodiles found in Australia, freshwater and estuarine. Their long jaws, protective armor, streamlined bodies and long tails make them very suitable for living in aquatic (26) ___________ like swamps and rivers. Crocodiles are cold blooded. Their body temperature changes (27) ___________ the temperature of the air, water and land of its surroundings. Freshwater crocodiles can be found at the rivers and swamps in some parts of Australia. They have narrow snout and reasonably straight jawline with even-sized teeth. Unlike the estuarine crocodiles, they are not 'man-eaters' and (28) ___________ mainly on insects, frogs, lizards, turtles, with bats, birds and small mammals. The estuarine crocodiles, (29) ___________, are found mainly in the warm climate of Sri Lanka, India, Myanmar as well as other some countries in Southeast Asia and Australia. They have broader snouts than freshwater crocodiles, with an uneven 'up and down' jawline and irregular-sized teeth. It is estimated that they can live for at least 70 to 100 years.  

(Source: englishdaily626.com)

Do you think this dress is too young-looking for me? - I don't want to look like___________

Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions  

He was rejected by his family. He decided to become a monk.