Read the following leaflet and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 7 to 12.

Saving the Oceans

The oceans occupy over 70% of the Earth's surface and provide food for billions of people. (7)____ people once believed the oceans were an infinite resource, scientists now warn that human activity may seriously damage marine ecosystems.

Today the oceans face a vast (8)____ of environmental threats such as overfishing and pollution. Large fish like tuna, cod, and sharks are often caught (9)____ the open ocean before they reach maturity. To protect marine resources, experts suggest several actions:
• Reduce demand in the (10).
• Prevent (11) fishing that destroys fish populations.
• Support conservation programs to ensure that oceans (12)____ valuable for future generations.

(Adapted from Inside Reading)