问题
选择题
Mary, I should tell you it is the third time that you________ your homework. [ ]
A. forgot to do
B. forgot doing
C. have forgotten to do
D. had forgotten doing
答案
答案：C
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Mary, I should tell you it is the third time that you________ your homework. [ ]
A. forgot to do
B. forgot doing
C. have forgotten to do
D. had forgotten doing
答案：C