单项选择题
A.It is very interesting to have a name. B.It is very easy to be remembered. C.It is very easy to be told from others. D.Both B andC.
A.must be careful B.should keep air away from it C.must know it is dangerous D.should cover it with water only
A.Fire can help people in many ways. B.Fire can be both helpful and dangerous. C.Fire can burn things and people. D.We must be careful with matches.