Heart________is much more common these days than it was even ten years ago.A、sur

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问题 Heart________is much more common these days than it was even ten years ago.

选项 A、surgery
B、surgeon
C、work
D、circulation

答案 A

解析 句意:现在心脏手术比十年前更加普遍。surgery(外科手术);surgeon(外科医生);work(工作,职业);circulation(流通,循环)。
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