三、任务型阅读

阅读下面的短文，从短文后的选项中选出能填入空白处的最佳选项，其中有一项为多余选项。
Summer is here. One of the best ways to cool off on a hot summer day is to jump into a swimming pool. Swimming is a great exercise, and a trip to a pool or beach is a good way to have fun with friends. (1) , so it's important to stay safe as you do it. Here are a few things you can do to swim safely.
• Swim only in areas set for swimming.
Don't swim unless there is a lifeguard(救生员) on duty. If you're on a beach near the ocean, this is especially important. In some places, fast currents(急流) can sweep swimmers away without warning. So if a sign says "No swimming", please take care.
• Be careful when diving(跳水) into the water headfirst.
Most pools have deep ends where diving is safe. In natural water, don't dive unless you know that the water is deep enough. (2) , causing injury(伤害) or death.
• Make sure you have a partner with you.
Nobody knows what will happen while you are swimming. If something goes wrong, you can get help from that person as soon as possible. In this situation, (3) .
• Pay close attention to children’s safety.
Kids who don’t know how to swim should wear life jackets. But by themselves they are not enough, (4) . If you have a pool at home, put a fence(围栏) around it in case children fall in. And if a child disappears, check the pool first.
A. skilled kids may forget green hands
B. so an adult should always be present
C. But swimming can also be dangerous
D. a few seconds can make a big difference
E. Or you could hit your head on the bottom

【短文大意】针对在游泳时怎样保证自身安全，本文给出了一些建议。
1. C 【解析】设空后提到了“所以在游泳的时候，保证(自身)安全是很重要的”，由此可推断，游泳也是很危险的，故所缺的句子是C项。
2. E 【解析】本段讲的是跳水可能会对头部造成的伤害，故所缺的句子是E项。
3. D 【解析】上文中提到了“你可以尽快地得到那个人的帮助”，由此可推断，几秒钟能产生很大的影响，故所缺的句子是D项。
4. B 【解析】根据上文中的描述可知，不会游泳的儿童应该穿救生衣，但只靠他们自己还是不够的，成年人应该一直在场，故所缺的句子是B项。