“每日一练”进行中！为了更好地 助大家夯实基础， 近期向考生推出mpacc英语词汇自测习题及详细解析。
　　1.an ambulance must have priority as it usually has to deal with some kind of____.
　　a) urgency b) danger c) emergency d) crisis
　　答案:c emergency 紧急情况。urgency 紧急，急迫(注:emergency 表示“紧急情况”，urgency 表示“紧迫性”) 。danger 危险。crisis 危机;关键时刻。
　　2.this bird’s large wings____ it to fly very fast.
　　a) make b) cause c) ensure d) enable
　　答案:d enable sb. to do 使能够。make sb. do使，使得。cause sb. to do 使得(某人做某事) ，引起，使产生。ensure 保证，担保(不能与to 连用)。
　　3.when replying to this advertisement, please_____ a stamped ,self-addressed envelope.
　　a) contain b) enclose c) hold d) introduce
　　答案:b enclose 封入，附寄。contain 包容，容纳，常指一个大容器里面容纳着许多小物体。hold 用作及物动词时，也可表示“包含，收容，容纳”。introduce 介绍。
　　4.if a person talks about his weak points, his listener is expected to say something in the way of_____.
　　a) assurance b) persuasion c)encouragement d)confirmation 答案:c encouragement 鼓励。assurance 保证;自信。persuasion 说服，劝说。confirmation 证实

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　　5.humidity is so intense in some parts of the tropics that europeans find they are unable to _____ it.
　　a) maintain b) persist c)sustain d)endure
　　答案:d endure 忍受，容忍。maintain 保持，维持。persist (in) 坚持。sustain 支撑，承受( 重量) ;经受。