Original text:

So, ask businesses on both sides of the Atlantic, why have two lots of tests where one would do?

问题1：

Why have two test?

这句话的主语是什么？是不是应该是：why do they have two test?,

they = businesses on both sides of the Atlantic

完整的句子：Why do business on both sides of the Atlantic have two lots of tests?

问题2：

why 后面直接接动词原形，我认为这是一个错误，这句话需要加一个 do。

why not + 动词原形比较常见，但是 why + 动词原形，是不是故意省略了？

问题3：

where one would do 是定语从句，通常应该修饰前面的地点名词，但是它之前的名词是 tests.

这句话是否是再次省略了地点? 我想完整的句子应该如下：

So, businesses on both sides of the Atlantic ask why (they) have two lots of tests (on the both sides of the Atlantic) where one (lot of test) would do?

谢谢！