It was the chief engineer came we began the experiment.A、not until

游客2023-10-19 31

问题 It was ______ the chief engineer came ______ we began the experiment.

选项 A、not until; that
B、not until; then
C、until; that
D、until; when

答案 A

解析

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It was ______ the chief engineer came ______ we began the experiment.A、not until