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Ⅰ. (★) 用 can/can't/could/couldn't 填空。
1. Little Tom ________ swim before, but now he can swim.
2. My grandma is deaf. She ________ hear.
3. She is a writer. She ________ write stories.
4. My grandpa ________ play basketball well when he was young.
1. Little Tom ________ swim before, but now he can swim.
2. My grandma is deaf. She ________ hear.
3. She is a writer. She ________ write stories.
4. My grandpa ________ play basketball well when he was young.
答案：
1. couldn't 2. can't 3. can 4. could
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