Miss Johnson is a friend of _______.
A. Mary’s mother
B. Mary’s mothers’
C. Mary’s mother’s
D. Mary mother’s
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Last week I called at my _____ .
A. aunt
B. aunt’s
C. aunts
D. auntes’
I can hardly imagine ____sailing across the Atlantic Ocean in five days.
A. Peter
B. Peters’
C. Peters
D. Peter’s
It won”t make much ________ whether you agree or not.
A. difficulty
B. trouble
C. difference
D. matter
No one has yet succeeded in explaining the ________ of how life began.
A. puzzle
B. cause
C. problem
D. reason
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