Living in a fast-paced world, we                  get left behind if we stop learning.
A．shouldB．dareC．mayD．need
C

試題分析：句意：生活在一個快節(jié)奏的世界中，如果我們停止學習可能會落后。May表示“不確定的可能性”，should“應該”，dare“敢”，need“需要”，所以選C。
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