问题补充：
-- Someones dropped and poured it on the new carpet.
-- Who it?
A. a coffee cup; has done
B. a cup of coffee; did
C. a cup for coffee; did
D. a coffees cup; has clone
答案：
A. a coffee cup; has done
(答案→)B. a cup of coffee; did
C. a cup for coffee; did
D. a coffees cup; has clone
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