According to the first paragraph, American customers spend a lot of money on supplements in order to avoid the following diseases except for ______.

(单选题)It is very ______ because she gave up the opportunity to Was (单选题)You must rely on ______ that we will assist you with these o (单选题)—Tom, don’t play the cell phone anymore. Please pass me ____ (单选题)（ ） (单选题)（ ） (单选题)（ ） (单选题)What does Karen Ash’s experience show? (单选题)What’s the author’s attitude to staycationers’ following som (单选题)Why did people begin to take staycations? (单选题)Which aspect of staycations is mainly talked about in the fi