Have you finished the plan？ ——Yes, and it_____ by the experts fo

  • 2024-01-15 11:14:15
  • 于敏
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Have you finished the plan？ ——Yes, and it_____ by the experts for three times. A. was being studied B. has studied C. has been studied D. studied

A.A

B.B

C.C

D.D

正确答案是C