The lecture was just getting to the heart of the matter ____ the class period en

游客2024-01-19 94

问题 The lecture was just getting to the heart of the matter ____ the class period ended.

选项 A、before
B、until
C、after
D、when

答案 D

解析时间副词用法题。when意为“这时，正在这时”。

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