If Mickey Mouse slips (滑倒)on a banana skin on TV, viewers laugh. But for ordinary people, falling is not   36  . For example, if you   37  over a stone or fall off your bike, you have to take days to get well. For   38  people, the result of a fall could be worse.
Scientists at the University of Pittsburgh, USA, wanted to know why some people are   39  likely to fall than others.
The researchers found that   40  means more than planting your feet on the ground and standing tall. Your brain   41  your sense of balance with information from your eyes and inner ears and the   42  from your feet and legs. If something goes wrong with any of these, you’re   43   to fall. People   44  to fall more often as they grow older because their senses are slower.
State of mind is important too. The research shows that when people know they’re walking on a slippery surface, they   45  their pace and walk with flatter feet. As a result, they fall less often.
“We actually   46  people slip and fall,” researcher Mark Redfern said. People of different ages fall on   47 in his lab. Cameras   48  their falls and a computer analyzes the information. Scientists then can   49  people who fall often how to be more watchful.
“If they get   50  to a lifelike but controlled environment, people can   51  learn to handle the   52  thing,” Redfern said.
Falls happen to everyone sometimes.   53  you see someone fall, think about why and offer a helping   54  . This person’s painful experience may   55  you from falling at the same place.

A．unhappy B．exciting C．amusing D．foolish

A．drop B．trip C．knock D．get

A．slow B．young C．old D．active

A．too B．less C．very D．more

A．balance B．control C．fall D．walk

A．remains B．imagines C．thinks D．keeps

A．touching B．feeling C．walk D．pace

A．likely B．surely C．possible D．certain

A．refuse B．mean C．tend D．like

A．frighten B．quicken C．widen D．slow

A．encourage B．make C．stop D．challenge

A．purpose B．ground C．accident D．agreement

A．broadcast B．record C．play D．catch

A．persuade B．force C．practise D．train

A．closed B．informed C．used D．know

A．eventually B．firstly C．regularly D．mainly

A．uneasy B．real C．creative D．hard

A．Even if B．While C．As far as D．Next time

A．hand B．stick C．word D．leg

A．warn B．remind C．prevent D．defend