--- _______ the plane have taken off on time?
--- I’m afraid not. So many flights were delayed due to the bitterly cold weather.
| A．Will | B．Should |
| C．Can | D．Must |
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--- _______ the plane have taken off on time?
--- I’m afraid not. So many flights were delayed due to the bitterly cold weather.
| A．Will | B．Should |
| C．Can | D．Must |
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