问题
选择题
When my hand touched the letter in my pocket, I realized that I had forgotten ______ it. [ ]
A. to post
B. to have posted
C. posting
D. having posted
答案
答案：A
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When my hand touched the letter in my pocket, I realized that I had forgotten ______ it. [ ]
A. to post
B. to have posted
C. posting
D. having posted
答案：A