问题
选择题
Peter forgot to tell us when______. [ ]
A. did he call you up
B. he called you up
C. did he call up you
D. he called up you
答案
答案：B
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Peter forgot to tell us when______. [ ]
A. did he call you up
B. he called you up
C. did he call up you
D. he called up you
答案：B