–How soon can you finish the work?
--We can finish it in 20 minutes if we have one more person ________ us.
| A．to help | B．helps | C．helped | D．helping |
–How soon can you finish the work?
--We can finish it in 20 minutes if we have one more person ________ us.
| A．to help | B．helps | C．helped | D．helping |
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