（４） 要认真注意细节，做到语法正确。一些答案在意义上讲都是正确的，但从线索上看要找出语法正确的答案。如：
Ｍr Evans is an old man of about sixty His wife died a few years ago His chi
ldren ______ him by then．
A left B would leave C have left D had left
答案应为D。这句话正确的语意都是"离开"，但仔细发现有 by then 之说，由此可得出这是个动作的截止时间，应选为 had left 过去完成时态。下面再看一些例子。
（１） 语意第一原则
A young father was visiting an old neighbour They were standing in the old man's garden and talking about ______ ．
A trees B flowers C children D old people
那么他们谈论的中心是什么呢?可能是树、花，由于他们是在花园里谈论。但如果前后的段落配合看，则其谈论的也可能是孩子和老年人。这就是要求我们切勿望文生义。
