登录
第二节 阅读短文，从方框内所给的选项中选出可以填入空白处的最佳选项，其中有一个多余的选项。
Our ears play an important part in helping us experience the world around us. 17.
But how do they work? Our ears have three parts：the outer ear, the middle ear, and the inner ear. 18.
Our ears never stop working. Even when we are asleep, our ears are still working. They help us stay alert(警觉的)for any unusual sounds.
19.
20.
Our ears play an important part in helping us experience the world around us. 17.
C
We can enjoy music and the singing of birds through them.But how do they work? Our ears have three parts：the outer ear, the middle ear, and the inner ear. 18.
D
It collects sound around us. The sound then travels through the middle ear and into the inner ear before reaching the brain.Our ears never stop working. Even when we are asleep, our ears are still working. They help us stay alert(警觉的)for any unusual sounds.
19.
E
In the inner ear, there are organs(器官)to help us keep our balance.20.
A
Some nerves(神经)in the middle ear connect the tongue to the brain. If something happens to your ears, you may have a hard time telling different flavours(味道)apart. So we should take good care of our ears.答案
17. C 18. D 19. E 20. A
