A patient cannot be assisted to death under the "Death with Dignity Act" if ______.

单项选择题It can be derived from the passage that ______.

单项选择题According to the passage, insufficient sleep is harmful in that it can cause all BUT ______ of the following.

单项选择题By saying insomnia is caused by life (Para. 3), the author means that ______.

单项选择题According to Waite and Gallagher's book, divorce is responsible for its harmful effects on all the following EXCEPT ______.

单项选择题It can inferred from Para. 4 that the author is ______.