A:Hey,what’s up?Did you watch TV yesterday?
B:Oh..i’m sorry,yesterday I didn’t watch TV.So what happened?
A:Many children are affected by dengue fever.What do you think we should do?
B:Well,I think we must be careful and keep clean to our surrouding.
A:What do you mean?you ought to tell me ,please?
B:Well, I think we must replace the vase waterand bathtub drain at least once a week etc.
A:Yes,you’re right.It’s all a nest of mosquito dengue fever and our society and there are still many people who do not know about that.
B:You shouldn’t litter the rubbish in carelessly
A:I agree with you .In this way we can stop or at least decrease the number of dengue fever patient by keeping everything clean.