题文
We should produce less things from raw materials, _____ is growing smaller and smaller.
| A．whose supplies | B．the supply of which |
| C．which supply | D．the supply of whom |
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We should produce less things from raw materials, _____ is growing smaller and smaller.
| A．whose supplies | B．the supply of which |
| C．which supply | D．the supply of whom |
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