单项选择题
Professor White contributed a lot to our community,（）
A.teaching, writing, and lecturing B.teaching, writing, and a lecturer C.a teacher, a writer, and lecturing D.teaching, lecturing, and a writer
单项选择题 Professor Smith promised to look（）my paper, that is, to read it carefully before the thesis defense.
单项选择题 Pleased to meet you! ―（）
单项选择题 Please help yourself to the seafood.（）
