2. 外语
  3. Bob fails to attend the evening school. He______ sick, because he never asks for leave.(2014年厦门大学考博试题)

Bob fails to attend the evening school. He______ sick, because he never asks for leave.(2014年厦门大学考博试题)

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问题 Bob fails to attend the evening school. He______ sick, because he never asks for leave.(2014年厦门大学考博试题)
选项 A、may be
B、can be
C、must be
D、is
答案C
解析 句意为：Bob没有参加夜校，他一定是病了，因为他从来没有请假离开过。根据后半句可知，是肯定的情况，故选C项，表示确定和一定。
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