Multiple choice

According to scientists at the University of California, the pattern of changes that have occurred in human DNA over the millennia indicate the possibility that everyone alive today might be descended from a single female ancestor who lived in Africa sometime between 140,000 and 280,000 years ago.

  1. indicate the possibility that everyone alive today might be descended from a single female ancestor who

  2. indicate that everyone alive today might possibly be a descendant of a single female ancestor who had

  3. may indicate that everyone alive today has descended from a single female ancestor who had

  4. indicates that everyone alive today may be a descendant of a single female ancestor who

  5. indicates that everyone alive today might be a descendant from a single female ancestor who
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Error of subject verb agreement and modal usage. Here, the subject is singular (the pattern), so the verb should also be singular (i.e. indicates). Case of present tense, so modal 'may' is the correct usage. might' is generally used for past tense.

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