Work was to start on the first bridge across the Niagara gorge． Ice floes made crossing by boat impossible． The American engineer T． G．． Hulett did not wish to wait until spring． He offered ten dollars to anyone who could fly a kite across．

　　Many boys tried． Swift air currents carried kites down into the river instead of up and over it． After a day of trying, only one boy stayed． Just after dusk, Homan Walsh's second kite made the crossing． Three men caught it． Then Hulett attached a heavy rope to the kite string． The men hauled it over． A larger rope followed． Finally a heavy wire cable was pulled across．

　　The Niagara Suspension Bridge, begun by a kite, was completed in 1848．

1． The bridge begun by a kite spanned______．

A．the St． Lawrence River B． Niagara Falls

C． the Niagara gorge　　 D． None of the above

2． The account says boats could not be used because of ______．

A． ice floes B． the waterfall C． strong winds D． strong currents

3．The reward offered by the engineer was _______．

A． ten pounds　　 B． ten dollars

C．twenty dollars　　 D． None of the above

4．The reward was won after_______．

A．four hours B． ten hours C． a day D． two days

5．The boy who won the reward was named________．

A．T． G． Hulett B．Harold Walsh C．Homan Walters D．Homan Walsh

6． The number of ropes attached before the cable could be hauled over was______．

A．one B．two C．three D． None of the above

7． The bridge was completed in_________．

A． 1840 B． 1844 C． 1848 D． 1888

       "If I rest, I rust"——would be an excellent motto for those who are troubled by the slightest bit of idleness．Even the most hard-working person might adopt it with advantage to serve as a reminder that, if one allows his abilities to rest, like the iron in the unused key, they will soon show signs of rust and, eventually, cannot do the work required of them．

       Those who would attain the heights reached and kept by great men must- keep their ability polished by constant use, so that they may unlock the doors of knowledge, the gate that guard the entrances to the professions, to science, art, literature, agriculture—every department of human endeavor．

       Industry keeps the key bright that opens the treasury of achievement．If Hugh Miller, after toiling all day in a quarry, had devoted his evenings to rest and recreation, he would never have become a famous geologist．The celebrated mathematician, Edmund Stone, would never have published a mathematical dictionary, never have found the key to science of mathematics, if he had given his spare moments to idleness, had the little Scotch lad, Ferguson, allowed the busy brain to go to sleep while he tended sheep on the hillside instead of calculating the position of the stars by a string of beads, he would never have become a famous astronomer．

       Labor defeats all—not inconstant, or ill-directed labor; but faithful, persistent, daily effort toward a well-directed purpose．So industry is the price of noble and enduring success．

72．What may be the meaning of the underlined word "rust" in the 1 st paragraph?

       A．快乐                B．成长                C．进步                 D．生锈

73．Why does a hardworking person even use the motto? Because ______．

       A．he wants to remind himself that he is a hardworking man．

       B．he is afraid that he may idle．

       C．he wand to remind himself to rest from time to time．

       D．he feels he can do the work required of them．

74．By saying "Those who would attain me heights reached and kept by great men must keep their ability polished by constant use", the author means_______．

       A．those who want to get great achievements must practice their ability constantly

       B．those who use their ability constantly would attain the great height

       C．great men keep their ability polished

       D．great men polish their ability to reach their height

75．The main point of the 3rd paragraph is that ______

       A．industry is more important than agriculture．

       B．what industry really means here．

       C．giving some examples of how industry works in achieving great success．

       D．industry can keep the keys bright．