Attempting to reach his home before the storm, ________.

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A．John's bike broke down

B．the storm caught John

C．John had an accident on his bike

D．it happened that John's bike broke down

While attempting to reach his home before the storm，______．

A．the bicycle of John broke down

B．it happened that John’s bike broke down

C．the storm caught John

D．John had an accident on his bicycle