can, could, be able to

1. ____he understand what you were talking about?

• Could

• Can

• Couldn't

2. My sister____play tennis now.

• can to

• can

• could

3. I _____walk when I was less than a year old.

• can

• could

• can have

4. (Polite) ____ you tell me what time it is, please?

• Could

• Can

• Will

5. My grandfather _____walk without any help last night.

• can

• could

• was able to

6. I would like to ____play the piano.

• can

• could

• be able to

How long have you _____drive?

• can

• couldn't

• been able to

8.- I'll ____help you later.

• can

• could

• been able to

9.- Can you help me? I____never understand this.

• can

• cannot

• am able to

10. Will people ____live forever one day?

• could be

• be able to

• could be able to