问题
选择题
The light is still _________. Mr. Green _________ at home now. [ ]
A. on, can be
B. down, may be
C. on, must be
D. up, can't be
答案
答案：C
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The light is still _________. Mr. Green _________ at home now. [ ]
A. on, can be
B. down, may be
C. on, must be
D. up, can't be
答案：C