1. Supply can, can't, could, couldn't.

1. A good 1500-metre runner ... run the race in under four minutes. 2. Bill is so unfit he ... run at all. 3. Our baby is only nine months and he ... already stand up. 4. When I was younger, I... speak Italian much better than I... now. 5. He ... draw or paint at all when he was a boy, but now he's a famous artist. 6. ‑ ... she speak German very well? ‑ No, she ... speak German at all. 7. After weeks of training, I ... swim a length of the baths underwater. 8. It took a long time, but in the end Tony ... save enough to buy his own hi-fi. 9. ‑ Did you buy any fresh fish in the market? ‑ No, I ... get any. 10. For days the rescuers looked for the lost climbers in the snow. On the fourth day they saw them and ... reach them without too much trouble.