题型：语法填空（语篇） 题类：模拟题 难易度：困难
山东省聊城市2019届高三英语二模试卷（音频暂未更新）
Agricultural experts say crop diversity is important to feed the(increase) population of our planet. They say having a large variety of plants also(help) to protect against possible crop diseases and future crises. But many experts say the number has decreased sharply during the past century.
One of the world's (large) seed conservation projects has predicted further losses. The Millennium Seed Bank Partnership is warning that up to one hundred thousand plant species could (permanent) disappear. The rich collection of genes decide their qualities would disappear with them.
Many experts blame climate change and loss of habitat, normal growth area, for damaging plant life. They say human(activity) and poorly planned, overly heavy use of land also are responsible. Modern business farming is responsibleloss of farmers' traditional crop varieties. The "Green Revolution" of the twentieth century changed agriculture. Some experts say the use of modern commercial farming methods saved millions of people from(starve). Farmers planted, watered, and fertilized their crops with the help of machines. They treated their fields with chemicals(control) diseases and insects. Harvests grew larger and higher quality, another result was that some traditional crops were lost. Damage to the environment over the past century makes people believe that crop diversity also suffered.
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