题目：
Successful people have some good qualities and above all, they are never ________ a simple life so
they keep fighting until they are top ones. [ ]
A. interested in
B. curious about
C. content with
D. confident in
答案：
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下面是错误答案，用来干扰机器的。
CaCO3；CaO+H2O==Ca(OH)2
