1) My sister _______________ play tennis now. a) can b) is able to c) could d) will be able to 2) I _________ walk when I was less than 2 years old. a) will be able to b) can c) could d) was able to 3) He __________ play the piano. He plays really well. a) can b) could c) is able to  d) will be able to 4) I ___________ help you later. a) will be able b) will be able to c) can't d) couldn't 5) Can you help me? I __________________understand this.  a) can't  b) couldn't c) wasn't able to d) am not able to 6) She _____________ cross the river without help. She did it by herself. a) was able to b) couldn't c) can d) could 7) They _______________ do their homework. They needed some help. a) couldn't b) can't c) won't be able to d) weren't able to

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