难道一定要一道道发才有人回啊....呵呵

2 Reserchers have questioned the use of costly and experimental diagnostic tests to identify food allergies ,such as milk ,that supposedly disrupt normal behavior.

 A to identify food allergies ,such as

B to identify food allergies ,like

C to identify food allergies.such as to

D for identifying food allergies ,like that of

E for identifying food allergies ,such as for

为什么是C啊?还有A错在哪里啊???谢谢

对某物过敏 固定搭配 allergy to something

二楼的MM解的真好

such as 后一般接Ｎ或者doing，接to时只有两种可能一是错了，二是有省略

诚如二楼所说，乍一看还真蒙住了

在GMAT中，to identify> for identifying，就是说动词的优先性最高

根据新东方讲义， 动词》形容词》抽象名词》分词动名词》从句

Reserchers have questioned the use of costly and experimental diagnostic tests to identify food allergies( ,such as milk ,)that supposedly disrupt normal behavior.

定从修饰插入语前名词