7、.Bansmokingatwork.B.Buysomeworkclothes.C.Encouragestafftocycletowork.2217.Whatisthespeakers'business?A.Healthcare.B.Personalimage.C.Rubbishrecycling.听第10段材料,回答第18至20题。18.WhatisthemaindifferencebetweenthetwopartsofValencia? A.Thecolourofthebuilding. B.Thelengthofthestreets. C