单选题
Many doctors think it is helpful for night-shill workers ______.
A、
to sleep with a bright light on
B、
to plan sleep patterns carefully
C、
to avoid being disturbed at work
D、
to sleep for a long lime after work
【正确答案】
B
【答案解析】
[解析] 很多医生想该怎么做对值夜班的工人才有帮助呢?短文中有一句话说“However，many doctors recommend careful planning to help improve sleep patterns”，接着由举例说明怎样安排睡眠模式，因此答案选B。
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