问题
选择题
Now, I don't write a letter. I often write a\an _______ online. It's free and fast. [ ]
A. letter
B. e-mail
C. homework
D. novel
答案
答案：B
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Now, I don't write a letter. I often write a\an _______ online. It's free and fast. [ ]
A. letter
B. e-mail
C. homework
D. novel
答案：B