单选题 The possibility that the explosion was caused by sabotage cannot be______.
A. broken out B. cancelled out C. ruled out D. wiped out

【正确答案】 C

【答案解析】[解析] 本句意为“爆炸是由阴谋破坏所引起的可能性不能排除”。ruled out意为“用线划掉，取消，排除”，如：The snowstorm ruled out their weekly meeting．(暴风雪使他们一周一次的会议无法举行。)“break out爆发，逃脱；carrcel out取消，抵消；wipe out 擦掉，还清，消除”都不正确。