问题
选择题
-- Hello, Jessica! What happened?
-- I could not hear you clearly because my mobile phone could not receive a good _____.[ ]
A. sign
B. signal
C. symbol
D. mark
答案
答案：B
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-- Hello, Jessica! What happened?
-- I could not hear you clearly because my mobile phone could not receive a good _____.[ ]
A. sign
B. signal
C. symbol
D. mark
答案：B