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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