题目内容
4．As you know，reading in the sun ______ your eyes．（ ）| A． | is harm to | B． | is harmful to | C． | does harmful to | D． | harm to |
分析 如你所知，在太阳底下读书对你的眼睛有害．
解答 答案：B
解析：分析句子结构可知，动名词短语reading in the sun"在太阳底下读书"作句子的主语；动名词短语作主语时，句子的主语当作三单．故D选项直接排除（正确的应该是：harms），C选项应该为"does harm to"（因为does是动词，所以其后接名词），A选项应该为"be harmful to"（对…有害）．综上，本题答案为B选项．
点评 本题考查词语的辨析，做此类题目时一定要清楚各个选项的含义及用法；再结合句意及其它要求确定最终的答案．
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| 44．A．seize | B．perform | C．grow | D．accomplish |
| 45．A．abnormal | B．abundant | C．internal | D．interesting |
| 46．A．never | B．seldom | C．always | D．sometimes |
| 47．A．submitted | B．denied | C．suspected | D．associated |
| 48．A．workday | B．sleep | C．research | D．operation |
| 49．A．mice | B．scientists | C．assistants | D．brains |
| 50．A．determined | B．deposited | C．deduced | D．defined |
| 51．A．appetite | B．motivation | C．memory | D．growth |
| 52．A．synapses | B．room | C．section | D．avenue |
| 53．A．more | B．less | C．as | D．so |
| 54．A．managed | B．tended | C．hurried | D．prayed |
| 55．A．forget | B．remember | C．connect | D．experience |