LiRuyan13yearsold的精選

問題詳情：閲讀短文，掌握其大意，從每題所給的A、B、C、D四個選項中，選出最佳選項。LiRuyan,13yearsold,didsomethingspeciallastsummerwithhisclassmatesinShanghai.Theyworkedingroupswithtrafficpoliceatdifferentcrossr...