World population will continue rising from the current 5 billion until about 2050, but if the trends of the 1980s continue, it will ______ at about 9 billion.
A.
level up
B.
level off
C.
level on
D.
level down
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【单选题】Today, many people prefer to the prime time news altogether. Instead, they wait until 11 pm to switch on their TVs, when they can catch the Daily Show with John Stewart.