So far, some advanced teaching equipment, together with three hundred new books, ______ to those schools in the faraway area.
| A．has been sent | B．have been sent |
| C．was sent | D．were sent |
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So far, some advanced teaching equipment, together with three hundred new books, ______ to those schools in the faraway area.
| A．has been sent | B．have been sent |
| C．was sent | D．were sent |
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