专题02 完形填空10篇-2023中考英语逆袭冲刺名校模拟真题特快专递（上海专用）.docx

2023中考英语逆袭冲刺 名校模拟真题特快专递 第五 期 专题02 完形填空10篇 （2022 ·上海崇明·一模）Animals can move from place to place, but plants cannot. When an animals is under attack, it can run away or ___1___ . Plants certainly cannot run away, and they have no teeth or claws. But plants can protect themselves by using both physical and chemical means（方法）. Some plants have their own ways to keep animals ___2___ . For example, the leaves of the holly plant have sharp points that discourage（打消；阻止）grass-eating animals. Holly leaves on lower branches have more sharp points than leaves on upper branches. This is because the lower leaves are ___3___ for most animals to reach. Some plants, such as the oak tree, have special ways to discourage leaf-eating animals. They have thick and hard leaves that are ___4___ for animals to eat. Some grasses may contain a sandy material; eating such grasses down the animal's teeth. Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against a(n) ___5___ by increasing the production of these chemicals. When an insect bites a tobacco leaf, the leaf produces a chemical messenger（信使）. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the insect. Many plants ___6___ both physical and chemical defenses. A certain plant in China, for example, has sharp leaves, and each