The market for recycled commodities like aluminum and other metals remain strong despite economic changes in the recycling industry.

1. commodities like aluminum and other metals remain
2. commodities like those of aluminum and other metals are remaining
3. commodities such as aluminum and other metals remains
4. commodities, such as aluminum and other metals, remain
5. commodities, like the commodities of aluminum and other metals, remains

参考答案是E，我选C，GMAT中的举例不是要用such as么，而且E表达有点繁~~~望指教~~~

First we must undertsand how "such as" is different from "like". To understand

that, we have to get rid of how we are used to speaking everyday. "like" draws

an analogy but also at the same time an exclusion. For example, "can you buy

me some fruit LIKE apple?" , this means to buy me fruit that's NOT apple but

LIKe apple. It might sound very strange and against how we normally would use the word but technically that's how it works.

That being said, we should see

why "like" should be used