Complete the sentence: The patient's condition ____ steadily since the operation.

  • A. improves
  • B. has improved
  • C. improved
  • D. is improving

Explanation

Since the operation marks a period running from a past point up to now, which calls for the present perfect. The simple past would close the period off and cut the link to the present. The present continuous describes what is happening now without connecting it to the operation.

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