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A customer and a book seller.
B. A customer and a shop assistant.
C. A student and a librarian.
D. A librarian and his colleague.
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A customer
B. A chief
C. A salesman
D. A secretary
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A. Roomates
B. Relatives
Colleagues
D. Neighbours
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A. Colleagues
B. Strangers.
Classmates.
D. Playmates.