题目内容：

1.A computer is one of the greatest i_____in the world
2.At the a_____ of seven ,the lonely gril had to work to make living.
3.Health is more important to me than m_____

优质解答

A computer is one of the greatest (invention) in the world.计算机是世界上最重要的发明之一.At the (age) of seven,the lonely girl had to work to make living.这个孤苦伶仃的女孩七岁的时候就要做工去维持生...