阅读下面的短文，用方框中所给单词或短语的适当形式填空，使文意通顺、正确。(每词限用一次)
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should, use, dangerous,
habit, spend, much, safely, at, it, although
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Overhead
bridges are found in many parts of Lanzhou, especially in places where traffic
is heavy and crossing the road is very {#blank#}1{#/blank#}.
The
purpose of these overhead bridges is to enable passengers to cross the road
{#blank#}2{#/blank#}. Overhead bridges are used in the same way as zebra crossings.
They are more efficient {#blank#}3{#/blank#} less convenient because people
have to climb up a long flight of steps. This is inconvenient, especially to
old people. When passengers are {#blank#}4{#/blank#} a zebra crossing, traffic
is held up. This is why the government has built many overhead bridges to help passengers
and to keep traffic moving {#blank#}5{#/blank#} the same time.
The
government of Lanzhou has {#blank#}6{#/blank#} lots of money in building these
bridges. For their own safety, passengers {#blank#}7{#/blank#} be encouraged to
use them instead of risking their lives by running across the road. Old people,
however, may find {#blank#}8{#/blank#} a little difficult to climb up and down
the steps, but it is still {#blank#}9{#/blank#} safer than walking across the
road.
Overhead
bridges serve a very useful purpose. Passengers, both old and young, should
make a {#blank#}10{#/blank#} of using them. This will prevent unnecessary
accidents and loss of life.
