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1. The substance can be added to gasoline to accelerate the speed of automobiles. A) quicken B)shorten C) loosen D) enlarge 1. A. accelerate v.加速, 促进, 所以A(加快)是答案。shorten v.缩短, 变短;loosen v.解开, 放松, 松开; enlarge v.扩大, 放大; 词缀-en通常加在某些形容词的前面或后面，使其变成相应的动词，该词缀的含义是使变得更加.., 如：enlarge就是使变得更大/扩大。 2. We should never content ourselves with only a little knowledge. A) convince B)satisfy C) comfort D) benefit 2. B. 根据句意(我们切不可仅仅有一点点知识。)判断B(使满足)是答案。convince vt.使确信, 使信服; benefit n.利益, 好处vt.有益于, 有助于; comfort n.安慰, 舒适vt.安慰, 使缓和。 3. We should contemplated the problem from all sides. A) deliberated B)thought C) described D) designed 3. A. 借助搭配结构问题排除B(think后通常带宾语从句或带介词)和D(D的词义为设计， 因此D与问题搭配不合理)。根据句意(我们应该问题的各个方面)判断A(仔细考虑)最合适。 4. His health had deteriorated while he was in prison. A) became better B)became worse C) became stronger D) became weaker 4. B. 借助搭配健康，排除C和D(strong(强)和 weak(弱)都不能与health/健康搭配使用，只有身体才说强弱)，再借助句意(在监狱服刑期间他的健康)判断B(变得更糟糕)最合理。deteriorate v.恶化 。 | 
