单选题
Safety officials have
earnestly
questioned whether the increased use of synthetic materials heightens the risk of fire.
A、
cautiously
B、
severely
C、
accurately
D、
seriously
【正确答案】
D
【答案解析】
[解析] seriously“认真地”与earnestly的意思相吻合，cautiously“小心地；severely“严重地”；accurately“精确地”。
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