[单选题]辨认主题句Choose the best topic sentence from the four options below. Write the corresponding letter of your choice on the answer sheet. A Nuclear power plants cost a lot of money to build and to operate. B Nuclear power has been proven to be an uneconomical energy source. C Nuclear fuels must be mined, refined, and transported over great distances. D There are no nuclear power plants in such African countries as Ethiopia and Rwanda.
发布时间:2024-07-02 08:06:14