题文
There are many colors . I can’t decide ________________ .
| A．to buy which one |
| B．which one to buy |
| C．to buy which |
| D．which to buy one |
There are many colors . I can’t decide ________________ .
| A．to buy which one |
| B．which one to buy |
| C．to buy which |
| D．which to buy one |
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