题文
With the popularity of smartphones, the micro blog __________ a good platform for the young to show themselves gradually.
| A．becomes |
| B．has become |
| C．is becoming |
| D．became |
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With the popularity of smartphones, the micro blog __________ a good platform for the young to show themselves gradually.
| A．becomes |
| B．has become |
| C．is becoming |
| D．became |
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