Completeze aceste propoziții cu forma corectă : can , could sau be able to : 
It was late but luckily we           get the last bus home. 
If she wrote clearly , I            read her handwriting . 
Sorry ,          you repeat that ? I (not)          hear what you said .
 He worked very hard and he            earn a lot of money . 
 He was tired , but he            stay awake until he got home . 
 It was raining so we ( not )              go out.