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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Some years ago the captain of a ship was very interested in medicine. He always took medicine books to sea and liked to talk about different diseases. One day a lazy sailor on his ship pretended to be...
A.
test the captain's knowledge of medicine
B.
be free from work
C.
have the best food on the ship
D.
play a joke on his friends