下列小题中有A、B两个句子，其中A句是用一般过去时表示，请在B句空白处填入恰当的词，使其与A句意思相符。

Question

1.A:My cousins fell asleep ten minutes ago.
B:My cousins _______ _______ _______ for ten minutes.
2.A:The paper factory oppened in 1999.
B:The paper factory ______ ______ ______ since 1999.
3.A:Mr Smile borrowed the book three days ago.
B:Mr Smile ______ ______ the book for three days .

Answer 1

1 have been sleeping
2 has been being
3 has had