2. 外语
  3. Gunpowder was used extensively in firearms prior to 1990.

Gunpowder was used extensively in firearms prior to 1990.

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问题 Gunpowder was used extensively in firearms prior to 1990.
选项 A、in
B、around
C、from
D、before
答案D
解析 本题考查的是对形容词短语的认知能力。本句的意思是：Gunpowder was used extensively in firearms prior to 1990.1990年的前期火药被大量的运用于战争。prior to在…之前，如：It happened prior to my arrival．这发生在我到达之前。A．in在某年；B．around大约，接近于；C．from从……开始；D．before在……之前
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