【简答题】June 5 th is World Environment Day. This makes us pay more attention to our environment . When Wang Boxuan, a Beijing high schoolboy , uses up his exercise-books , he does not throw them away . Each o...
【单选题】听力原文:(A) The man is wearing protective gloves. (B) There are no bottles at all. (C) The man focuses on his book. (D) The room is used for conservation.
【简答题】Cloze 1 请填写完整单词 Railroads carry an important part of the total f______. The a_________ of rail transport lies in its a_______ to meet different needs. Railroads can carry the heaviest and the lightest...