单项选择题 I promise never to get drunk（）

单项选择题 Nowadays advertising costs are no longer in reasonable（）to the total cost of the product.

单项选择题 We all know that normal human daily cycle of activity is of some 7-8 hours' sleep alternating with some 16-17 hous' wakefulness and that, broadly speaking, the sleep normally（） the hours of darkness.