Ⅲ.综合运用

Why Are There No Safety Belts in High-speed Trains？

Many people may have such a question:Both airplanes and cars have safety belts,but why are there no safety belts in high-speed trains?There are three main r__1__for this.Let's check them out.

Firstly,high-speed trains are very stable.When a high-speed train starts moving,you may not even n__2__that the train has started unless you see the fast-changing scenery o__3__.

What's more，when a high-speed train accident happens，safety belts can do more h__4__than good to passengers（乘客）.Researchers（研究人员）have found that if passengers are bound to their seats，they are more l__5__to get hurt in an accident，because they are unable to move and escape.

Last but not least，most people might not be w__6__to fasten（扣紧）their safety belts in trains.High-speed trains are spacious（宽敞的），and people like to move freely inside their carriage（车厢）and go to other carriages to visit their friends.So few people want to be f__7__to their seats.

1.r____________2.n____________3.o____________4.h____________5.l____________6.w____________7.f____________