Multiple choice

Although schistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries.

  1. it is so debilitating that it has become an economic

  2. it is of such debilitation, it has become an economical

  3. so debilitating is it as to become an economic

  4. such is its debilitation, it becomes an economical

  5. there is so much debilitation that it has become an economical
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The original phrasing 'it is so debilitating that it has become an economic drain' is grammatically correct and idiomatic. The other options introduce awkward constructions or incorrect word forms.

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