to be still half asleep; to be half awake; to be not yet quite awake
to play dumb; to feign ignorance; to play the fool; to be in one's dotage
to feign ignorance; to play dumb
face of (feigned) innocence; blank look
to feign ignorance; to pretend one doesn't know
feigned ignorance; assumed innocence
to play dumb; to feign innocence