The school rule states that no child shall be, unless by an adult, allowed out of the school during the day.
As soon as they reached the fishing area, the fishermen __________ their nets into the sea.
Cloned pigs differ __________ the originals __________ looks and behavior.
—We must __________ their permission. Whatever the cost is. —But I'm afraid they will reject.
The two kinds of cellphones differ __________ shape, but they are similar __________ each other in some functions.
(2012·浙江) According to scientists, mental abilities begin to __________ from the age of 27 after reaching the highest level at 22.