1. he understand what you were talking about?a) Could b) Cans c) Coulded 2. My sister play tennis now.a) can to b) can c) will can 3. I walk when I was less than a year old.a) canb) could c)have can 4. (Polite) you tell me what time it is, please?a) Could b) Can c)Will 5. My grandfather walk without any help last night.a)can b) could c) was able to 6.I would like to play the piano.a) can b) could c) be able to 7. How long have you drive?a) can b) coulded c)been able to 8. I'll help you later.a) can b)could c)be able to 9. Can you help me? I never understand this.a) can b) cannot c) am able to 10. Will people live forever one day?a) could be b) be able to c)could be able to