问题描述：
-what do you think of the song _they are dan
-what do you think of the song _______they are dancing?
-It sounds wery nice.
填 (to which)为什么呀?请老师说一说
-what do you think of the song _______they are dancing?
-It sounds wery nice.
填 (to which)为什么呀?请老师说一说
问题解答：
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