Multiple choice

Researchers still know little about how the Lassa virus is spread and why the disease it causes, Lassa fever, causes complications in only some subjects though it spares many others.

  1. though it spares

  2. where it spares

  3. despite sparing

  4. when sparing

  5. while sparing
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

What the sentence wants to convey is that the disease causes complications in some subjects but at the same time spares others. This sense of time is best conveyed by 'while' among the given conjunctions. Hence (5).

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