Twomindswithasinglethought!Theyoungfishermanisthinkingo...

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问题详情：

Two minds with a single thought!

The young fisherman is thinking of a way to cross the stream without getting his __1__ engineer is thinking of a __2__ to get automobiles across the river without getting their wheels wet. You know the answer to __3__ problems：a bridge.

The fisherman's bridge doesn't take __4__ to Build. Just place a board across the little stream and you __5__ the board is strong enough and if the fisherman doesn't __6__ too much，all will be well.

Will the engineer __7__ the same kind of bridge？You know he __8__ and you know why. Automobiles are much heavier than __9__ river is much __10__ than the stream. A long wood bridge just won't __11__ isn't strong enough. It would __12__ and break under its own weight. The fisherman's problem is very __13__ver，the engineer's is not.

But don't __14__ sorry for the engineer. He doesn't have to __15__ the very beginning with a long board. People have been thinking about bridges for thousands of years. They have designed many types of bridges. Each bridge is suited to its special __16__ engineer can choose the type best suited to the river and the __17__ nearby.

What choice does he have，and why is one __18__ than the others？One way for you to find out is to make a few bridges out of cardboard. They won't be strong enough to __19__ a fiveton truck，but you will find out some of the main __20__ of bridge design by doing some experiments.

1．A．clothes B．socks C．legs D．feet

2．A．road B．route C．way D．course

3．A．all B．both C．none D．neither

4．A．long B．easy C．money D．strength

5．A．have it B．find it C．try it D．see it

6．A．want B．work hard C．care for it D．weigh

7．A．promote B．permit C．plan D．profit

8．A．will B．won't C．can D．cannot

9．A．cars B．trucks C．animals D．people

10．A．wider B．deeper C．more shallow D．more popular

11．A．do B．make C．pass D．arise

12．A．break out B．bring up C．bend D．burst