21.Time is a precious ________ that is often taken for granted among the young people.
A. commodity B. commission C. component D. constitution
【答案】A
【解析】
【详解】考查名词辨析。句意：时间是一种珍贵的东西，可是它往往不被年轻人重视。A. commodity 有价值的东西；B. commission委员会；C. component 组成部分；D. constitution 宪法。commodity “有价值的东西”符合句意。故A选项正确。
22.Linda ________ to her mother for so long that she figures out almost every gesture of her mother’s.
A. attended B. had attended C. would attend D. has attended
【答案】D
【解析】
【详解】考查现在完成时。句意：琳达照顾她母亲太久了，她几乎能领会母亲的每一个动作。分析句意可知，本句为现在完成时，表示过去所发生的动作或事情对现在的影响或产生的结果，着眼点在现在。由“she figures out almost every gesture of her mother’s ”可知，琳达照顾她母亲太久了。对现在的影响是，她几乎能领会母亲的每一个动作。故D选项正确。
