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led B. left / was calling
called
C. had left / had called
D. had left /
29. Last night, before I _________here, everyone___________to the party..
A. came / have gone
B. had come / went
C. came / had
gone
D. came / was going
30. Many species of animals become extinct each year before _______ can identify them.
A. biologically
B. biologists
C. biology
D. biological
31. She went to school in 15 minutes .
A. It took her 15 minutes to go to school
school
C. It was taking her 15 minutes to go to school.
B. It takes her 15 minutes to go to