【GWD几道题目~知道的同学帮帮忙~】

yiayia

三年了。。正好做到 我觉得b之所以错 是它用了两个定冠词 the melting 和 the sea level
这里只是陈述温室效应会使冰川融化和海平面升高 是个笼统的结果 不需要特指

enjoygmat2013

关于34题
解释C选项为何不对：
摘自Ron在Manhattan论坛上的解释：
1) there's no such construction as "A, B, but C". i.e., "but" can't link three things in the way that "and" or "or" could.

2) it makes no sense to put all 3 of these things in parallel, because they don't belong in parallel; the last two are an explanation of the first one. i.e., the last two things are an explanation of the idea that these shoppers "do very little impulse shopping".

Ron 的意思是，do very little impulse shopping, do not buy a pair of skis and a boomerang when they come in for a basketball, but leave with only a basketball 后两句是解释第一句的，这三个分句并没有平行的关系然而却构成了平行的机构，所以是错的

我认为还有一点，逗号+but，but作为连词，后面连接的应该是一个完整的句子，而C选项but后面是没有主语的。

而D选项对的很显然。those in department stores, do very little impulse shopping; someone who comes in for a basketball will leave with a basketball only and not buy a pair of skis and a boomerang as well
分号引起另一个完整的句子，同时可以解释说明第一句的主语shoppers，定语从句who comes in for a basketball 修饰someone，leave 和 not buy 构成平行。
在beatgmat论坛中这道题很普通，很多native speaker进来说了一句 "parallelism, choose D" 就走了。。