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How long do you think ______ the Microsoft brings out a new product?
| A．it will be before | B．will it be until |
| C．will it be when | D．it will be that |
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How long do you think ______ the Microsoft brings out a new product?
| A．it will be before | B．will it be until |
| C．will it be when | D．it will be that |
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