[ Grammar ]
I ______ this exercise twice. I can’t understand it 🙁
A. ‘ve done
B. ‘ve been doing
C. done
D. has
Select your answer:
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Grammar › ViewA tiger is a mammal. ____________ gives birth to its young.
A. I
B. It
C. He
D. She
Grammar › View
Peter is not confident _______ his ideas to the class.
A. to present
B. present
C. presenting
D. presented