题目

----How unhappy your roommate looks! ----Yes，but he’s not willing to tell me what it is____ is troubling him. A. what       B. which         C. as            D. that 答案：D 解析: 该题考查特殊疑问词what引导的强调句作tell的宾语，当强调句中有特殊疑问词时应把疑问词放在句子前面。若将该句改为非强调句为: but he’s not willing to tell me what it is troubling him.

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