Which sentence uses the correct tense?

A. By the time he arrived, the meeting had left.

B. By the time he arrived, the meeting left.

C. By the time he arrived, the meeting leaves.

D. By the time he arrived, the meeting has left.

答案解析

**Core Concept:** Past perfect tense (Grammar). **Analysis:** 'By the time + past event' requires the past perfect tense (had + past participle) for the earlier action. **Key Point:** Only A uses 'had left' correctly. **Error Check:** B uses simple past, C/D mix present tenses with past context.

正确答案：A

Which sentence uses the correct tense?

答案解析

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