不让实施？ (1). 单项填空
①Some policemen should be sent to _____ them _____ the trees. A. prevent; to cut down B. stop; cutting down C. keep; to cut down D. keep; cutting down
②It is going to rain today. Take an umbrella with you to_____you from the rain.
A．stop B．prevent C．keep D．protect ③Be quiet! It's rude to ____ people when they are talking. A. stop B. introduce C. prevent D. interrupt ④The notice prevented ________.
A. to smoke B. him to smoke C. smoking D. him smoking (2). 单句改错
①Mr. White was wearing dark glasses to protect his eyes for the sun. ______________________________________________________ ②This kind of medicine should be prevented from light.
______________________________________________________
115. protect ...from ... 保护??免受??；
例句：
①You must learn to protect yourself from the danger.你必须学会保护自己，免遭危险。
②She had to defend herself against the guard dog. 她不得不防备看门狗咬她。
③A policeman was guarding the entrance to the embassy.一位警察正守卫在大使馆出口处。
④It is one of the duties of the police to preserve public order.警察的职责之一是维持公共秩序。 比较：
protect ...from后接较小的事情或危害，如：frost, harm, catching cold。protect ...against ...后接较大的事情，如：战争、灾害、重税、威胁等。keep sb. from doing sth. prevent/stop sb.(from) doing sth.阻止某人做某事；keep sb. doing sth.使某人一直做某事；defend ...from/against保卫??以抵御?? ；
辨析：defend/protect/guard/preserve
defend 保卫；防护；防守（含有采取措施抵制进攻的意思）；protect 常含有提供安全的方式来驱开不适、伤害或进攻的意思；guard 含有看守的意思；preserve 指采取措施维护、保护、保存。 单项填空
①The PLA men were ___ the city against the attacks from the air. A. defending B. guarding C. preventing D. protecting ②We must always be already to ___ our country ___ aggression (侵略). A. protect; from B. guard; against C. defend; against D. prevent; from
③Use the umbrella to _____ yourself from the rain. A. prevent B. protect C. defend D. protection
④A fence at the back of the garden ___ us ___ the neighbours but we still often help each other.
A. protects; from B. divides; into C. separate; into D. separates; from Keys:
111. (1). CCCC (2). ① paid off②pay off③paid④paid; to⑤pay; back 112. BAAB
113. (1). DCBA (2).①in place of ②taking the place of③in place 114. (1). BDDD (2). ①for→from ②prevented→protected 115. ACBD