I don’t doubt _________.
| A．that the music is worth listening to |
| B．if the music is worth listening to |
| C．that the music is worth listening |
| D．whether the music is worth listening to |
I don’t doubt _________.
| A．that the music is worth listening to |
| B．if the music is worth listening to |
| C．that the music is worth listening |
| D．whether the music is worth listening to |
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