四道英文谜语难倒你

测试说明：题目为谜面，所提供答案中有一个是正确谜底，开始答题：
1. What table is in the field?
 A.Timetable.
 B.Vegetable. 

2. What is the only thing you can break when you say its name?
 A.Silence.
 B.The Air.

3. What is there in your house that ought to be looked into?
 A.Refrigerator.
 B.Mirror.

4. What is that which you have never seen, heard or felt, which never existed and still has a name?
 A.Nothing
 B.Anything