[单项选择]The best title for this passage could be ______. A. Types of Research Reports B. Types of Journal Articles C. Writing of research Reports D. Writing of Different Articles
A. it B. anything C. everything D. what 参考答案:D 答案解析:此题考查主语从句。从题干中可以看出空项为主语从句的主语, A项中的代词it,B项中的不定代词anything和C项中的不定代词 everything不能引导主语从句,因而应排除。D项what为疑问代词