Which of the following words is formed through derivation?

A.students B.shorter C.bought D.insanity

Which of the following is a display question?

Which of the following exercises would a teacher most probably use if he/she wants to help students develop discourse competence?

根据提供的信息和语言素材设计教学方案,用英文作答。

设计任务：请阅读下面学生信息和语言素材,设计20分钟的口语教学方案。教案没有固定格式,但须包含下列要点：●teaching objectives●teaching contents●key and difficult points●major steps and time allocation●activities and justifications 教学时间:20分钟学生概况:某城镇普通中学七年级（初中一年级）学生,班级人数40人。多数学生已经达到《义务教育英语课程标准（2011年版）》二级水平。学生课堂参与积极性一般。语言素材：Ms Li: Hello, my name is Li Fang. I’m your teacher and you are my students. I’m Chinese. I’m from Wuhan. What’s your name?Lingling: My name is Wang Lingling.Ms Li: Nice to meet you, Lingling. Where are you from?Lingling: I’m from Beijing. I’m Chinese.Ms Li: How old are you?Lingling: I’m thirteen years old.Ms Li: Good. Hello, what about you?Darning: Hello, Ms Li, my name is Li Darning and I,m from Beijing, too. I’m twelve years old. Ms Li: Thanks. Hello, are you from America?Tony: No, I’m not. I’m from England. I’m Tony Smith.Ms Li: Nice to meet you, Tony. Hi, are you English, too?Betty: No, I’m not. I’m American and my name is Betty King.Lingling: Tony and Betty are our friends.Ms Li: Good! Welcome to Class 4 Grade 7!

The difference between/ʃ/and /ʒ/ lies in （ ）.

Which of the following is a referential question?