## 2011年5月8日 星期日

### Re: [SC. ] pp08-166

※ 引述《truthlier》之銘言：
: A. has been established by carbon dating, but what is much more difficult to
:    determine are
: B. have been established by carbon dating, but what is much more difficult to
:    determine are
: C. have been established by carbon dating, but that which is much more
:    difficult to determine is
: D. has been established by carbon dating, but what is much more difficult to
:    determine is
: E. are established by carbon dating, but that which is much more difficult to
:    determine is
: 答案是D
: 對於A有疑惑，因為後面接的是the use..., the reason..., and the meaning of...
: 想請問一下A選項中的are為何錯?