Multiple choice

Although the phenomenon of withdrawal has always been the crucial physiological Leng for distinguishing addictive from nonaddictive drugs, it has become increasingly evident that not all regular heroin users experience withdrawal symptoms.

  1. addictive from

  2. addictive and

  3. addictive or

  4. between addictive or

  5. among addictive or
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The idiom distinguishing X from Y is the standard way to express a difference between two categories. The original sentence correctly uses this construction, so no change is needed for that specific phrase. Note that Leng appears to be a typo for criterion or test.

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