According to the latest BBC news, a five-year-old boy from England _______ the youngest computer specialist in the world．
| A．became | B．becomes |
| C．had become | D．has become |
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According to the latest BBC news, a five-year-old boy from England _______ the youngest computer specialist in the world．
| A．became | B．becomes |
| C．had become | D．has become |
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