DearSteven,I'mgladthatyouarecomingtoBeijingthissummerva...
問題詳情：DearSteven,I'mgladthatyouarecomingtoBeijingthissummervacation.Youaskedmanyquestioninyourletter,andnowletmeanswerthem.Tostartwith,Beijing,thecapitalofChina,isveryattractivecitywithalonghistory...