4、 visited by clouds went sky had sawDearSimon,Howareyou?LastweekI_______toXi'an.It'sinthenorthwestofChina.Iwentthere_______plane.Theplanetookustothe_______.First,Iwasalittle _______.ThenIlookedoutofthewindow.Theplanewasabovethe_______.I_______somemountainsbelow.I