题目

When a pencil is partly in a glass of water, it looks as if ＿＿＿＿. A. breaks     B. has broken  C. were broken     D. had been broken 答案：C 解析: as if引导的从句，如果所说内容与事实不相符时，常用虚拟语气。此题是一种自然现象，故应用一般过去时。注意比较It seems／looks as if it is going to rain.(看起来天将要下雨。)

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