问题
选择题
It is reported that our children are being ________ by lead in the air.[ ]
A. poison
B. poisoned
C. poisonous
D. poisoning
答案
答案：B
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It is reported that our children are being ________ by lead in the air.[ ]
A. poison
B. poisoned
C. poisonous
D. poisoning
答案：B