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JAMB Use of English 1992 Question 63

Question 63

Tenses

Fill the gap with the most appropriate option: Four engineers ________ on this system since March

  1. A.worked
  2. B.are working
  3. C.had worked
  4. D.have been working
Show the answer and explanation

Answer: D (have been working)

Explanation

'Since March' shows an action that started in the past and continues now, so the present perfect continuous 'have been working' is needed.