comeputers are very useful in our lives,()they?A isn't B wasn't C_英语解答

comeputers are very useful in our lives,()they?
A isn't B wasn't C doesn't D aren't

人气：321 ℃　时间：2020-05-13 17:06:00

解答

D
前面肯定,后面否定
前面否定,后面肯定
例句：They are very cute,aren't they?
They are not very cute,are they?