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