【问】 The problem is that，____children are given cow's milk from birth benefit greatly fromit，those who have never drunk it by a certain age are not able to tolerate it.A. because B. since C. whereas D. in view of the fact that

请就上面试题讲一讲whereas的用法。

【答】 从属连词whereas能够引导两种从句。

A.whereas引导对比从句，其用法和含义相当于while，但比while语气强，而且更正式：

1. Humans are capable of error whereas the computer is not.(EED)

人可能犯错误，而计算机却不可能犯错误。

2. Some praise him，whereas others condemn him.(MD)

有些人赞扬他，而有些人遣责他。

3. Whereas the US has immense mineral wealth，Japan(in contrast) has comparatively little. (CGEL)

美国拥有丰富的矿藏，而日本拥有的矿藏却很少。

B. whereas引导让步状语从句(我国的英语辞书很少谈到这一用法)，其用法和含义相当于while，但是它要求两个情景之间有对偶关系：

Whereas the amendment is enthusiastically supported by a large majority in the Senate，itsfate is doubtful in the House. (CGEL)

尽管此修正条在参议院得到大多数参议员的热情支持，但是它在众议院的命运却是很难确定的。