单项选择题

One of the【C1】______ beautiful sights in the bird world is the male peafowl, or peacock, strutting (炫耀) proudly【C2】______ with its magnificent【C3】______ raised and its richly【C4】______ tail feathers【C5】______ in the sunlight. The peacock's many colored 'tail' is not really a tail at【C6】______. It is a fan【C7】______ of stiff, beautiful feathers. This fan is【C8】______ by the peacock's true tail. In【C9】______ to the glorious plumage, a peacock has a crest of upright feathers on its heaD.【C10】______, the peahen, or female peafowl, is usually colored a dull brown and has neither【C11】______ nor crest.
The peafowl is a member of the pheasant【C12】______. It may be found【C13】______ wild in the jungles of Asia and of the East Indies. Tame peafowl may be seen in nearly all other parts of the world,【C14】______, although their flesh and their eggs are【C15】______ good for【C16】______ use, they are generally kept【C17】______ ornaments or curiosities in parks and in zoos. Peafowl in a wild state feed【C18】______ grass, grain, frogs, insects and snails. In【C19】______, however, they thrive on grains commonly【C20】______ to poultry.
【C1】
A.many
B.more
C.most
D.much

A.【C10】______,
B.
C.
【C1】
A.many
B.more
C.most
D.much
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单项选择题
A new computer system has been designed to stop ships sinking. The greatest danger 【21】______ a holed vessel is that flooding of its compartments will make the ship unstable enough to capsizE.It is estimated that nearly half the ships 【22】______ during the second world war capsized because of the loss of 【23】______ .Pacer systems of Burlington, Massachusetts, has now 【24】______ a system devised by a 【25】______ US Navy officer, Stephen Drabouski, which effectively thought out alternative strategies for the ship. The 【26】______ is programmed with every possible eventuality of flood damagE.【27】______ the actual damage is keyed into the computer the operator is told by the computer 【28】______ the implications are and what can be done to destabilize the vessel.Trials on the 'American aircraft carrier USS Midway' have 【29】______ that the reaction time to damage can be cut to a fiftieth. An incident was simulated in which the ship was 【30】______ by two missiles causing flooding to 30 compartments. It took 10 minutes 【31】______ receipt of the flood damage information in the damage control center to a full printout of damage effects, 【32】______ countermeasures and an assessment of the result of the countermeasures;In a re-run of the incident 【33】______ the computer program the damage control officer took four and a quarter hours to establish the 【34】______ of the damage and another four hours 【35】______ a decision could be taken on counter measures.【36】______ the system can be used to provide damage control officers with advice, they do not, of course, have to 【37】______ the information. Quite often the' 【38】______ solution' will be unacceptable for operational reasons. When that happens the system can be asked for 【39】______ or the operator can interrogate the computer to find out what would happen 【40】______ the officer's own solution was put into action.【21】A.toB.onC.inD.for
A.B.
C.
D.
【21】
A.to
B.on
C.in
D.for