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　　21.同位语从句只能用that引导(that无实际意义,e.g. The news that he is gay proves…) 22.在GMAT中,复数名词可以拥有单数事物, e.g. Three out of four own a bicycle. Some have a preferred status over others. 23.rich and poor等同于the rich and the poor 24.type和kind不能等同于事物,要加of P135 8-11 25.While(whereas)一般不引导时间状语从句,而是表示前后的强烈对比,并且要注意前后的搭配(一致),包括单复数和时态.
　　P136 8-12 P144-22; while 动词现在分词, 与主句动作做强烈对比 26.Despite后不跟动名词短语,只跟简单名词 27.that和whom所引导的成分为宾语时可省略,e.g. the guy he talked to, the pain it causes, etc. 28.that在其它情况下不能省略! The doctor suggests that… 29.WHAT的用法: A1 is to B1 what A2 is to B2; WHAT的另一种用法what is now P138 8-15 30.当引导从句时, 介词 which优于where, 因为前者更明确