--- What ________ you?--- I'm ________ of being left alone in the house.A.terrify; terrifiedB.terrifies; terrifiedC.terrified; terrifyingD.terrifies; terrifying
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B解析点拨：本题考查terrify作动词和be terrified of... 的运用。“什么使你害怕？”what作主语，谓语动词用单数；“我害怕独自留在家里。”be terrified of... 是固定短语。