【評論主題】17. They hadn't planned on meeting, it was a _______ coincidence that they did.(A) pure (B) cle

【評論內容】pure coincidence→純屬巧合

【評論主題】21. 《韓非子》：「齊宣王使人吹竽，必三百人，南郭處士請為王吹竽，宣王說之，廩食以數百人。宣王死，湣王立，好一一聽之，處士逃。」上述故事中南郭處士為何要逃？(A)大勢已去 (B)不相為謀 (C)東窗

【評論內容】濫竽充數