GWD 17--Q17

１．Because fish look through water, their eyes are very different from a mammal.

1. from a mammal
2. from a mammal’s
3. from that of a mammal
4. than that of a mammal
5. than is a mammal’s

答案　　Ｂ　我选Ｃ　　

为什么啦？ＸＤＦ　说　　Ａ's 的省略结构单独出现的话是错的嘛，这道题目该怎么解释呢？

1. a single ancestor’s who is thought to have lived
2. a single ancestor’s who was thought to live
3. a single ancestor whom it is thought had lived
4. the Y chromosome of a single ancestor who is thought to have lived
5. the Y chromosome of a single ancestor whom it was thought had lived

 答案是Ｄ　，但是　为什么用have lived 啊？后面有个　１４０，０００years ago 啊！！　我选了Ｂ

使用their eyes与
                    a mammal’s比较对等

很清楚表述为眼睛与眼睛比较

至于that of a mammal…….结构与their eyes不对等…

会使读者误解不知是mammal的啥东西…结构也不符合对等原则

第二道ancestor’s who??????必删

因为一般常见为ancestor who..