Flu（流感）easily spreads from one person to another． If you are weak， you probably catch flu easily． Do you know how you can avoid flu？ Here are some suggestions：

    Keep in good health

    You can eat everything you want but make sure that your diet is healthy． The healthier you are， the better it is for you to avoid any type of illness around． Most doctors suggest drinking lot of fresh fruit juice and water is helpful to avoid flu．

    Stay away from people with flu

    If a member of family or a friend has flu， stay away from him / her until he / she is well． Flu is very communicable． If you stay with the person with flu， you can catch flu easily． Wear a mask（口罩）and avoid using things that the person with flu is using．

    Exercise

    Exercising will make you stronger，which means a stronger immune system（免疫系统），too．Exercise often so that your body will keep healthy． It doesn't matter what kind of exercise it is．

    Be happy

    Happy people are healthy people． Their life isn't stressed out， so they may be safe from illness．If you are unhappy， you will easily get sick．

    Avoiding the flu is easy． Just boost（增强）your immune system and it will take care of the rest．

（1）How many suggestions of avoiding flu are talked about in the passage？　　

A． Three

B． Four

C． Five

（2）The underlined word "communicable"means "　　"．

A． 无效的

B． 致命的

C． 传染的

（3）What should we do to stay away from people with flu？　　

A． Exercise often

B． Eat junk food

C． Wear a mask

（4）What's the best title（标题）of this passage？　　

A． How to avoid flu．

B． How to keep in good health．

C． How to exercise．