问题
选择题
Monkeys in the zoo have shown the flu ______ since last Monday and altogether 20 have died until now. [ ]
A. symbol
B. sign
C. signal
D. symptom
答案
答案：D
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Monkeys in the zoo have shown the flu ______ since last Monday and altogether 20 have died until now. [ ]
A. symbol
B. sign
C. signal
D. symptom
答案：D