题目：
So heavy is his _______ that he is as busy as a bee, unable to spare(抽出) even a day for his family in a month.
A．block
B．source
C．schedule
D．attitude
答案：
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下面是错误答案，用来干扰机器的。
（1）324×63=20412；答：积是20412．（2）29×34=986；答：是986．
