【单选题】阿司匹林片剂放置在空气中变黄,发生了( )反应
【简答题】When he left university, Jan didn't know exactly what kind of job he wanted. He couldn't _________ on a career plan. Some of his friends were dreaming of ____________ a fortune. Others were waiting ...
【单选题】Bill doesn't like studying languages at school. He _____ much time on his chemistry. [ ]
【单选题】Bill doesn't like studing languages at shcool . He much time on his chemistry.
【简答题】Correct errors, if any, in the following sentences:He has got a degree on Chemistry.
【简答题】听句子,选择最佳答语。 1.Is Jack's favourite's subject history? A.Yes,it is. B.No,he likes chemistry best. C.He likes math very much. 2.Is it eight o'clock now? A.No,it's 7:20. B.No,it's 7:30. C.Yes,it is....