题文
—What about going to the South Lake for a picnic next weekend？
—OK．But I’m not sure________it will rain．
| A．why |
| B．where |
| C．when |
| D．whether |
—What about going to the South Lake for a picnic next weekend？
—OK．But I’m not sure________it will rain．
| A．why |
| B．where |
| C．when |
| D．whether |
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