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Answer: ___ b b a c ?Finish the exercises in Learning English. ?To preview Grammar on page 23. 。 在做本練習(xí)時(shí),一邊“聽(tīng)”一邊“記憶”,在此基礎(chǔ)上選擇正確的答案。state national president n. 州 adj. 國(guó)家的;民族的; 全國(guó)的 n. 總統(tǒng) Words Review to learn about American culture. learn the new words: state, national, president Objectives: What is the building in picture 1? The White House. It is the official residence (