The boy looked very (sad/sadly) He looked at his friend (sad/sadly) You can (do/to do) whatever you like The two sisters

1) The boy looked very sad. 2) He looked at his friend sadly. 3) You can do whatever you like. 4) The two sisters were so angry, they always looked ugly. 5) He was washing his hair when the telephone was ringing. 6) That was why he didn\'t answer it. 7) Neither Fred nor Larry play the piano.