pre-test 34, 请指教...多谢

fomento

34. 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. the same ....

C. hot sauces and exercise both stimulate the release of endorphins in the brain, and they have a pain-relieving effect like morphine.

I chosed C but A is right. 为啥要write morphine's ??

kittyv

这里是说effects和morphines有相似之处把.

而且c里面both...and的结构使用错误呢!

如果both已经出现在主语后面, and后就应该没有they才对哦~