A. to form B. form C. forming D. having formed
A. protecting B. protect C. being protected D. to protect
A. to discuss B. being discussed C. to be discussed D. will be discussed
A. seizing; disappeared B. seized; disappeared
C. seizing; disappearing D. seized; disappearing
A. is B. was C. being D. been
A. including a child B. include a child
C. included a child D. includes a child
A. studied B. studying
C. to have studied D. to be studying
A. lost B. having lost C. losing D. having loss
A. did we B. didn't we C. dared we D. daren't we
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