单选题
It was his firm
conviction
that every effort should be made to preserve world peace.
A、
doubt
B、
belief
C、
persuasion
D、
enthusiasm
【正确答案】
B
【答案解析】
[解析] 题干：他
坚信
应尽一切努力来维护世界和平。conviction意为“深信”，与belief同义。
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