El prólogo explica de manera clara y concisa el contexto

dióxido de cloro)

se enfrenta a los misterios más insólitos

para andar por la vida

Creí que no volvería a saber nada de él

LOOK 5° WB BRITISH VOLOJ / CAMPI El prólogo explica de maneraGet up close with Look, a seven level series for young learners of English. See something real with amazing photography, authentic stories and video, and inspiring National Geographic Explorers. Help learners make connections in English between their lives and the world they live in through high interest, global topics that encourage them to learn and express themselves. With short, fresh lessons that excite students and make teaching a joy,