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题目

The show ( ) by the time we arrive at the theatre.A. has startedB. will startC. startsD. will have started

The show ( ) by the time we arrive at the theatre.

A. has started

B. will start

C. starts

D. will have started

题目解答

答案

D. will have started

解析

本题考查动词时态的正确使用，核心在于理解时间状语从句的逻辑关系。关键点在于：

"by the time"引导的从句表示主句动作在从句动作之前完成；
从句中的"arrive"为一般将来时，说明动作发生在将来；
主句需用将来完成时（will have + 过分）表示在将来的某个时间点前动作已完成。

选项分析

A. has started（现在完成时）：表示动作已完成，但未明确与将来的"arrive"时间关联。
B. will start（一般将来时）：表示动作将发生，但不符合"by the time"要求的完成性。
C. starts（一般现在时）：表示经常性动作，与具体情境不符。
D. will have started（将来完成时）：正确体现在到达前（将来时间点）动作已完成。

关键逻辑

"by the time"从句用将来时 → 主句用将来完成时；
表示"到达时"（将来时间点）演出已开始。

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