考点-2 prevent...from 阻止;制止
【教材原句】They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.【例句研读】
(2) The security forces had to intervene to prevent the situation _______
安全部队不得不介入,以防止局势进一步恶化。
Further treatment will prevent the disease _______ developing.
进一步的治疗将阻止疾病恶化。
【答案】(1)to live
(2) worsening
(3)from
【拓展归纳】stop sb. (from) doing sth. 阻止某人做某事 keep sb. (from) doing sth. 阻止某人做某事 protect sb. from...保护某人不受……侵袭,,【即时巩固】Chinese President Hu Jintao called for an immediate ceasefire in Libya________an even worse humanitarian crisis in the country at the BRICS Summit in Hainan Province.
A.to prevent
B.to have prevented
C.preventing
D.having prevented
答案 A 句意:在海南举行的金砖四国会议上中国主席胡锦涛呼吁利比亚立即停火以避免引起更严重的人道主义危机。
(2) We must do whatever we can to ________ our environment getting worse and worse.
A. separate
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