问题
选择题
To turn off my cell phone before going to bed seems to be a rule . [ ]
A. to never break
B. never to have broken
C. never to be broken
D. never to be breaking
答案
C
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To turn off my cell phone before going to bed seems to be a rule . [ ]
A. to never break
B. never to have broken
C. never to be broken
D. never to be breaking
C