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单选题
Night-shift workers often find it difficult to sleep in the morning because _____.
A
their internal clock will not allow them to
B
they are often disturbed by morning visits
C
they are not trying hard enough to do so
D
they are too tired to go to sleep well
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解析：
判断推理题。题目询问“夜班工人发现清晨难以入睡的原因是什么？”从文章倒数第三句“Night-shift workers often find it...”可知，难以入睡是因为身体的自然规律被打破，此时体内生物钟不允许睡觉。正确答案为A。
判断推理题。题目询问“夜班工人发现清晨难以入睡的原因是什么？”从文章倒数第三句“Night-shift workers often find it...”可知，难以入睡是因为身体的自然规律被打破，此时体内生物钟不允许睡觉。正确答案为A。
更多 “单选题Night-shift workers often find it difficult to sleep in the morning because _____.A their internal clock will not allow them toB they are often disturbed by morning visitsC they are not trying hard enough to do soD they are too tired to go to sleep well” 相关考题
考题
单选题According to the passage, some doctors recommend that night-shift workers should _____.A
have frequent visits and phone callsB
improve their family relationshipC
have two smaller sleep periodsD
rely mainly on light therapy
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