—Sorry, I didn’t hear the door bell ring.
—Your bell . Perhaps it needs repairing.
| A．never worked | B．is never working |
| C．never works | D．had never worked |
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—Sorry, I didn’t hear the door bell ring.
—Your bell . Perhaps it needs repairing.
| A．never worked | B．is never working |
| C．never works | D．had never worked |
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