单项选择题

My friend and classmate Paul ______ horse-riding in his spare time.

A. practice
B. practices
C. is practiced.
D. is practicing
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His Selected Poems ______ first published in 1986.
A. were
B. was
C. has been
D. is
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The newly-built library is a ______ building.
A. five-storey
B. five storeys
C. five-storey's
D. five storeys'
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