题目内容：

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

Both colds and flu make you feel uncomfortable, and both of the breathing infections1.(cause)by viruses. But what is the real difference between the cold2.flu?

Their symptoms(症状 )are similar, so it can be hard to tell which has hit you first. Finding out 3.you have, though, can mean better treatment and getting better faster. Avoid the virus in the first place with these tricks that doctors use4.(avoid)colds and flu.

While colds are unpleasant, they5. (rare)last long and aren’t usually serious; the flu, however, is a different matter. In the 2015-16 season, flu caused 11 million medical visits, 308,000 hospital visits, and 12,0006.(dead). Most people get over both a cold and the flu in7.(little )than two weeks without visiting the doctor. If you're at high risk of8.(develop)serious complications（并发症） from the flu- such as anyone with heart disease or asthma（气喘）-you should visit a doctor，9.can give you flu antiviral drugs. Anyone else can reduce symptoms with these natural10.(cure)for cold and flu