题目内容
3. 1 can hear birds (sing) in the tree outside.
4. (Sudden) , 1 heard a noise from the bushes.
3. singing
4. Suddenly
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题目内容
3. 1 can hear birds (sing) in the tree outside.
4. (Sudden) , 1 heard a noise from the bushes.
3. singing
4. Suddenly