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题目内容
（延安大学大学英语）
(单选题) Mr. Write can be very sad in private, though ________ he is very cheerful.(本题3.5分)
A、 by himself
B、 in person
C、 in public
D、 as individual
A、 by himself
B、 in person
C、 in public
D、 as individual
参考答案
