问题
选择题
_______while writing, he locked himself in his study. [ ]
A. Not to interrupt
B. Not being interrupted
C. Not to be interrupted
D. Being not interrupted
答案
答案：C
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_______while writing, he locked himself in his study. [ ]
A. Not to interrupt
B. Not being interrupted
C. Not to be interrupted
D. Being not interrupted
答案：C