广东省10-11学年高一下学期期末复习检测（完形填空）
When a baby sees a ball, the baby may reach out for it. If the baby is very young, and you 21 枕头), then the ball 22 exists for the child. As the child grows older, the child will move the pillow to get the ball. Even though the child cannot see the ball, the ball still exists. This is an early example of “learning to see the 23 ”.the ball behind a pillow (
