3. Don’t get off the bus until it ____. A. has stopped . B. stopped C. will stop D. shall stop选项为A,但下面的 解释都不好

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3. Don’t get off the bus until it ____. A. has stopped . B. stopped C. will stop D. shall stop选项为A,但下面的 解释都不好
3. Don’t get off the bus until it ____. A. has stopped . B. stopped C. will stop D. shall stop
选项为A,但下面的 解释都不好

3. Don’t get off the bus until it ____. A. has stopped . B. stopped C. will stop D. shall stop选项为A,但下面的 解释都不好
当然选A 了
这是现在完成时表叫来 如还不明白我一会再给你讲

King1895解释的很好