题文
They each carried__________ on their backs.
| A．so big an equipment |
| B．a such big equipment |
| C．so a big piece of equipment |
| D．such a big piece of equipment |
They each carried__________ on their backs.
| A．so big an equipment |
| B．a such big equipment |
| C．so a big piece of equipment |
| D．such a big piece of equipment |
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