英语单选题(过程）
1，There are many valuable services,which the public are willing to pay_______,but which_____not bring a return in money to the community(翻译） A不填，does B不填， do Cfor,does D for ,do 2,Having climbed for three hours ,the travelers finally got to the top of Mount Tai,_____they could enjoy the sunrise. A when B which C from that D from which
答：我想选Ｂ吧．．．尽管我不知道Ｂ是什么意思．．． 如果是Ａ的话，不应该接to buy而应该是buying. pay some money for somethin...详情>>
答：B 被动语态，be found to do. A中的made与found均为过去分词，冲突！详情>>
问：hArd work 和hArd--working有什么区别
答：一个是名词 一个是形容词撒详情>>
