The boy looked very (sad/sadly) he looked at his friend (sad/sadly) you can (do/to do) whatever you like the two sisters were so (angry/angrily), they always (looked/were looking) ugly he (washed/was washing) his (hair/hairs) when the telephone (rang/was ringing). that was why he (didn't answer/wasn't answering) it. neither fred nor larry (play/plays) (piano/the piano)
