PREP07上SC（2）一题关于these用法

qingzi501

34. (26262-!-item-!-188;#058&003094)

Besides adding complementary flavors to many foods, hot sauces stimulate the release of
endorphins in the brain, just as exercise does, and these have a pain-relieving effect like
morphine's.

(A) hot sauces stimulate the release of endorphins in the brain, just as exercise does, and these
have a pain-relieving effect like morphine's
(B) hot sauces stimulate the release of endorphins in the brain, like exercise, and they have a
pain-relieving effect that is like morphine
(C) hot sauces and exercise both stimulate the release of endorphins in the brain, and they have a
pain-relieving effect like morphine
(D) the release of endorphins in the brain is stimulated both by hot sauces and exercise, and they
have a pain-relieving effect like morphine's
(E) the release of endorphins in the brain is stimulated by hot sauces, just as with exercise, and
these have a pain-relieving effect like that of morphine
各位帮忙看一看，为什么答案是A？these不是不能单独作为代词指代，必须后面补足名词吗？求指导！！！

鱼winwin

manhanttan上是说不行
这个题选a
大概也许是又行了。。。

鱼winwin

好像是说跟前半句主语一样
就给省了

qingzi501

manhanttan上是说不行
这个题选a
大概也许是又行了。。。

-- by 会员 鱼winwin (2012/3/13 21:48:41)

嗯，manhattan明确说了不行的，记得PREP上好像也说过不能直接用。真是纠结。