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1 . Richard was called in by the police to answer questions the disappearance of Thomas Riley, whose relatives were his present situation.
| A．concerning; concerning about | B．concerning; concerned about |
| C．concerned；concerning about | D．concerned; concerned about |
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2018-04-08更新
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4卷引用：黑龙江省鹤岗市第一中学2019—2020学年高三上学期10月月考英语试题
