— What's wrong with your uncle?
— We're sure _______ something is wrong with him, but we doubt _______ the disease can kill him.
| A．if; whether | B．that; that |
| C．whether; if | D．that; whether |
— What's wrong with your uncle?
— We're sure _______ something is wrong with him, but we doubt _______ the disease can kill him.
| A．if; whether | B．that; that |
| C．whether; if | D．that; whether |
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