Can, could, be able to

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. Sally wasn't at home, but I ... contact her at her office.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. After 2 years in China, I ... speak quite fluently now.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. When he was 40, he ... speak six languages.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. When I was a child I used to ... stand on my head.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. If you tell him your problem he might ... help you.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. After 6 hours climbing, we ... reach the top of the mountain.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. Can you read this for me? I ... see without my glasses.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. Yesterday I lost my keys and I looked for them everywhere, but I ... find them.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. I've never ... speak Spanish as well as my brother.

Choose the correct form of can, could, be able to (affirmative or negative). Use a form of be able to only if a form of can or could is not possible. I hate ... understand my French neighbours.