Hi there.<br/><br/>According to my grammar book, you cannot use 'could' as to show the action <br/><br/>which happened only once like this.<br/><br/><span style="color:#6000bf;">1. She could get out of the rubbles in the accident 10 days ago.</span><br/><br/>The book says that you should use 'was able to' instead in this case.<br/><br/><span style="color:#6000bf;">1-1. She was able to get out of the rubbles in the accident 10 days ago.</span><br/><br/>Any suggestion?