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.

单项选择题 His red hair and short（）made him easy to recognize.