Dew is formed the grass is thick.A.when B.where C.which D.asThe motorist looked over the engine carefully on the way.A.so that it should go wrong.B.lest it should go wrong.C.in order that should not go wrong.D.for >【3道状语从句
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【答案】 Dew is formed ______ the grass is thick.
A.when B.where C.which D.as
句子缺少的是状语,可以是时间状语,也可以是地点状语.从语法上来讲,AB都对.但当我们整个句子可以理解,就发现了逻辑上的差别：当草长得厚实的时候,露珠就形成了；和 在草长得厚实的地方,露珠会形成.根据客观事实可以排除when,因为露珠不是草长厚实了的时候就形成.
The motorist looked over the engine carefully ____ on the way.
A.so that it should go wrong.B.lest it should go wrong.
C.in order that should not go wrong.D.for fear that it should not go wrong.
B．先来看看四个项的意思.A这样它就会坏掉,B唯恐它坏掉；C目的是它不坏掉（但in order 后面接不定式,所以这个从语法上讲就是错的）,D恐怕它不会坏掉（这个从语义上就可以排除）.所以,带入原句,就可以知道答案了.
The lower ___ in a room,the more slowly our eyes focus.
A.the level of lighting B.light level C.leveling of light D.lighting is level.
这个句子套用的格式是the + adj/adv 比较级+ 主语（+be/谓语）,the adj/adv 比较级+ 主语+be/谓语,所以空里缺少的只是个主谓结构或者主语+be的结构,四个项里只有D是这样的结构,但是D里的内容是不对的,level的形式不对,所以只能选不加谓语部分的内容,也就是A.