Choose the option that best completes the gap. Mrs. Okoro __________ in this school since 1975

  • A taught
  • B has been teaching
  • C was teaching
  • D is teaching
jamb 2018english-language

The correct answer is B. has been teaching

'Since' implies from a specified time in the past. A present perfect progressive tense describes an event in a progressive form that started in the past and ended in the present. 'has been teaching' is an example of a verb element associated with a present perfect progressive tense 

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