单选题
--You didn't write to Tom?-- ______ him, too?
A、
Must I write to
B、
Must I have written to
C、
Should I write to
D、
Ought I to have written to
【正确答案】
D
【答案解析】
[解析] 对过去的虚拟，用ought to have done。故本题答案为D。
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