问题
选择题
It is true that knowledge_____ rather than being taught.
A．learns
B．learned
C．is learned
D．was learned
答案
答案：C
考查被动语态。题干是一个说明客观真理的强调句，故从句要使用一般现在时，排除B和D。knowledge与learn构成被动关系，用is learned。故选C。
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