It’s _______ that we will never forget it.

He is ______ learning English well[ ]

What I want tototeenagers is that being addicted to the Internet will to some extent do harm toboth mental and physical health．

There is so much noise around his flat that he feels mad.

Are you ________ American or English— English. We have worked in Lianyungang for two years. (注意答题技巧：答句中的English)