A．HoweverB．ThereforeC．AlthoughD．Whereas
A. However
B. Therefore
C. Although
D. Whereas
What does the author mean by saying "work is a mixed blessing"？
A. Work is contradictory to conversation.
B. Work is the antonym of friendship.
C. Work contains both good and bad aspects.
D. There are various kinds of person in the world.
A．ButB．AndC．SoD．If
A. But
B. And
C. So
D. If
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