In the Gulf of Mexico the animals' presence close to shore means their usual habitat is badly polluted, and the crowding could ________ mass die-offs as fish run out of oxygen.
Two pages of the original manuscript (底稿) of Albert Einstein's General Theory of Relativity were________ on display in the Israel Pavilion of the 2010 World Expo in Shanghai. A.put up B set down C. sent up D. taken up