---John, why are you so upset?
---I my cell phone all morning but it is nowhere to be found.
| A．am looking for | B．have looked for |
| C．have been looking for | D．had looked for |
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---John, why are you so upset?
---I my cell phone all morning but it is nowhere to be found.
| A．am looking for | B．have looked for |
| C．have been looking for | D．had looked for |
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