The government-run command post in Tunis is staffed around the clock by military personnel

The government-run command post in Tunis is staffed around the clock by military personnel, meteorologists and civilians. On the wall are maps, crisscrossed with brightly colors arrows that painstakingly track the fearsome path of the enemy.
　　What kind of invader gives rise to such high-level monitoring? Not man, not beast, but the lowly desert locust(蝗虫). In recent months, billions of the 3-inch-long winged warriors have descended on Algeria, Libya, Morocco and Tunisia, blackening the sky and eating up crops and vegetation. The insect invasion, the worst in 30 years, is already creating great destruction in the Middle East and is now treating southern Europe. The current crisis began in late 1985 near the Red Sea. Unusually rainy weather moistened the sands of the Sudan, making them ideal seedbed for the locust, which lays its eggs in the earth. The insect onslaught threatens to create yet another African famine. Each locust can eat its weight (not quite a tenth of an ounce) in vegetation every 24 hours. A good-size swarm of 50 billion insects eats up 100,000 tons of grass, trees and crops in a single night.
　　All ﹩150 million may be needed this year. The U.S. has provided two spraying planes and about 50,000 gal. of pesticide. The European Community has donated ﹩3.8 million in aid and the Soviet Union, Canada, Japan and China have provided chemical-spraying aircraft to help wipe out the pests. But relief efforts are hampered by the relative mildness of approved pesticides, which quickly lose their deadly punch and require frequent replications. The most effective locust killer dieldrin has been linked to cancer and is banned by many Western countries and some of the affected African nations. More than 5 million acres have been dusted with locust-killing chemicals; another 5 million will be treated by the end of June.
　　On May 30, representatives of Tunisia, Algeria, Libya, Morocco and Mauritania will meet in Algiers to discuss tactics to wipe out the ravenous swarms. The move is an important step, but whatever plan is devised, the locust plague promised to get worse before the insects can be brought under control.
【小题1】The main idea of the first sentence in the passage is that .A．the command post is stationed with people all the time.B．the command post is crowded with people all the time.C．there are clocks around the command post.D．the clock in the command post is taken care of by the staff.【小题2】The favorable breeding ground for the locust is .A．rich soil.B．wet landC．paces covered crops and vegetationD．the Red Sea【小题3】People are alert at the threat of the locust because .A．the insects are likely to create another African famine.B．the insects may blacken the sky.C．the number of the insects increases drastically.D．the insects are gathering and moving in great speed.【小题4】Which of the following is true?A．Once the pesticides are used, locust will die immediately.B．Relief efforts are proved most fruitful due to the effectiveness of certain pesticides.C．Dieldrin, the most effective locust killer, has been widely accepted in many countries.D．Over 10 million acres of affected area will have been treated with locust-killing chemicals by the end of June.【小题5】The purpose for affected nations to meet in Algiers on May 30 is .A．to devise anti-locust plans.B．to wipe out the swarms in two years.C．to call out for additional financial aid from other nations.D．to bring the insects under control before the plague gets worse.B

(答案→)B 解析：【小题1】B这句话的意思是：政府在突尼斯的指挥所整天是大多是由军事人员,气象学家和平民。 也就是指挥所一直都是人。【小题1】B推理题：从文章的句子：Unusually rainy weather moistened the sands of the Sudan, making them ideal seedbed for the locust, which lays its eggs in the earth.推断出蝗虫喜欢湿地。【小题1】A细节题：从文章第二段的句子：The insect onslaught threatens to create yet another African famine.看出蝗虫会又一次造成饥荒。【小题1】D数字计算题：从倒数第二段的句子： More than 5 million acres have been dusted with locust-killing chemicals; another 5 million will be treated by the end of June. 可以看出到六月底将有1千万公顷的受影响的土地用杀蝗虫的药物治疗。【小题1】A推理题：从文章最后一段的句子：but whatever plan is devised, the locust plague promised to get worse before the insects can be brought under control.可看出选A。

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