Read the passage and choose the correct answer

　　Many children like to watch TV because there are many interesting programmes on TV 　(1)　 they don't know watching TV for a long time is bad for their eyes.

　　　(2)　we look at the children around us, we can see many children wearing glasses even at six or seven years old. 　(3)　parents and teachers should tell them not to keep watching TV for a long time.

　　TV programmes are interesting 　(4)　 children can learn a lot from these programmes, but we should take good care of our eyes.

(1)

[　　]

A．But　　B．Because　　C．So

(2)

[　　]

A．If　　B．Because　　C．But

(3)

[　　]

A．If　　B．So　　C．Because

(4)

[　　]

A．because　　B．but　　C．and