题文
Up to now, large quantities of food __________ to Africa to save the starving people.
| A．has been sent | B．have been sent |
| C．are sent | D．is sent |
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Up to now, large quantities of food __________ to Africa to save the starving people.
| A．has been sent | B．have been sent |
| C．are sent | D．is sent |
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