---Mum, it’s late. Why are you still here?
---Dad hasn’t come back yet. I _____ for him.
| A．am waiting | B．have waited |
| C．was waiting | D．waited |
---Mum, it’s late. Why are you still here?
---Dad hasn’t come back yet. I _____ for him.
| A．am waiting | B．have waited |
| C．was waiting | D．waited |
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