2．The government isalarmed（警覺）by the sudden increase in the violent crime．

分析 政府對暴力犯罪的突然增加感到震驚．

解答 答案 alarmed考查過去分詞．根據(jù)所給的漢語提示"警覺"和空前的系動詞is及空后的by可知，此句是被動語態(tài)，此處應用動詞的過去分詞形式，故填 alarmed．

點評 動詞是中學英語的重要語法，解題時首先要根據(jù)語境和句子結構的需要來推斷動詞的形式，然后根據(jù)句意和所給的漢語提示選出正確答案．

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