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Exercise 3: Fill in the gaps with "yet, ago, ever, last night, for or since"

1. My father went to Italy five days _______.
2. He has known her _________ 2001.
3. Have you ___________ seen an elephant?
4. She hasn’t finished her work __________.
5. He has lived in Madrid _________ ten years.
6. We went to bed at 11 o’clock __________.