When their first test failed, the engineers at OKM Corporation agreed it was ________to try using different materials.

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问题 When their first test failed, the engineers at OKM Corporation agreed it was ________to try using different materials.

选项 A、time
B、end
C、moment
D、turn

答案A

解析 本题考查it 句型。It is/was time to do sth.表示“是该作某事的时候了”,代入句中,构成了整句的句意“当OKM公司的工程师第一次测试失败后,他们达成一致;是时候尝试使用不同的材料了”。其他三项均不符合题意,均排除。
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