The parents were unsettled for the first few days,           about their son’s safety.
A．having worried B．to worryC．being worriedD．worried
D

這題考查形容詞做伴隨狀語的用法，worried about這里做伴隨狀語，句意是：父母前幾天很不安，為孩子的安全擔(dān)心。選D。
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