1. Magic Tree House 2권 7장 - A Secret Passage 이 장에서는 주요 표현으로 'I'd better look in the book', 'The floor of the room was made up of stones', 'Annie came over and helped him lift the stone square out of its place', 'Were the batteries running down?', 'I think our light's dying!', 'The light got dimmer a...