GWD 10-32

jerry1121

好象都没人问嘛,自己可能是太差了.

Q32:
Most of the purported health benefits of tea comes from antioxidants—compounds also
found in beta carotene, vitamin E, and vitamin C that inhibit the formation of plaque
along the body’s blood vessels.

A. comes from antioxidants—compounds also found in beta carotene, vitamin E, and
vitamin C that

B. comes from antioxidants—compounds that are also found in beta carotene,
vitamin E, and vitamin C, and they

C. come from antioxidants—compounds also found in beta carotene, vitamin E, and
vitamin C, and

D. come from antioxidants—compounds that are also found in beta carotene, vitamin E, and vitamin C and that

E. come from antioxidants—compounds also found in beta carotene, vitamin E, and
vitamin C, and they.

这里的compunds 是指什么啊?是antioxidants吗? 为什么compunds在破折号后面指的是antioxidants. 而在GWD 9-1

A mixture of poems and short fiction, Jean Toomer’s Cane has been called one of the
three best novels ever written by Black Americans—the others being Richard Wright,
author of Native Son, and Ralph Ellison, author of Invisible Man.

A. Black Americans—the others being Richard Wright, author of Native Son, and
Ralph Ellison, author of Invisible Man

B. Black Americans—including Native Son by Richard Wright and Invisible Man by Ralph Ellison

C. a Black American—including Richard Wright, author of Native Son, and Ralph
Ellison, author of Invisible Man

D. a Black American—the others being Richard Wright, author of Native Son, and
Ralph Ellison, author of Invisible Man

E. a Black American—the others being Richard Wright’s Native Son and Ralph
Ellison’s Invisible Man

这里破折号后面却不跟作者而是跟的作品呢?

请NN指点破折号的用法.

jerry1121

自己顶下

andrew_li

http://webster.commnet.edu/grammar/marks/dash.htm