题文
---I have got a headache.
---No wonder. You_________in front of the computer too long.
| A．work |
| B．are working |
| C．have been working |
| D．worked |
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---I have got a headache.
---No wonder. You_________in front of the computer too long.
| A．work |
| B．are working |
| C．have been working |
| D．worked |
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