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Don't try to get off the bus ____ it has stopped.

A. while             B. as                C. since             D. before

Don't try to get off the bus ____ it has stopped.

A. while             B. as                C. since             D. before

Don't try to get off the bus ____ it has stopped.

A. while             B. as                C. since             D. before

Don't try to get off the bus ____ it has stopped.

A. while             B. as                C. since             D. before

Don't try to get off the bus ____ it has stopped.

A. while             B. as                C. since             D. before