There was a (an) silence between us after we were left alone in the sitting-room.
A. awkward
B. angry
C. adequate
D. patient
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(答案→)A. awkward
B. angry
C. adequate
D. patient
解析：形容词辨析。A难使用的，笨拙的；尴尬的；B生气的；C足够的；D耐心的；结合句意可知A正确。句意：当我们被单独留在会议室的时候，有了一段尴尬的沉默。