摘要：4．Don’t get off until the bus ． A．stopped B．will stop C．will have stopped D．stops
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Don't get off until the bus ________.
[ ]
A．stopped
B．stops
C．will have stopped
D．will stop
Don't get off the bus until it ________.
[ ]
A．has stopped
B .stopped
C．will stop
D．shall stop
Don't get off the bus until it ________.
[ ]
A．will stop
B．has stopped
C．stopped
D．is stopping