2. 外语
  3. There are certain ______ when you must interrupt people who are in the middle of doing something.

There are certain ______ when you must interrupt people who are in the middle of doing something.

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问题 There are certain ______ when you must interrupt people who are in the middle of doing something.
选项 A、situations
B、conditions
C、occasions
D、environments
答案A
解析 situation n.形势，局面，环境，状况，场合，情况。condition n．状况，状态：(先决)条件。occasion n．时机，机会：时刻，时候，场合。environment n．环境，自然环境，周围状况。
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