①this ②is ③dog ④Helen's ⑤no ⑥isn't ⑦it请用这些单词组成一句英文句子.
问题描述：
①this ②is ③dog ④Helen's ⑤no ⑥isn't ⑦it
请用这些单词组成一句英文句子.
答
This is Helen's dog?
NO,it isn't