China added 50.9 million Internet users in 2012，________ the total to 564 million at the end of last year.
| A．brought | B．bringing |
| C．having brought | D．to bring |
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China added 50.9 million Internet users in 2012，________ the total to 564 million at the end of last year.
| A．brought | B．bringing |
| C．having brought | D．to bring |
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