想一想，选一选。1. 当你告诉别人你是一名学生时，你应说：

[ ]

A. I am a student.
B. I am a teacher.
C. You are a student.2. 你想介绍“这是我的老师”时，你应说：

[ ]

A. This is my teacher.
B. I am a teacher.
C. You are a teacher.3. 当你想说“我有一把雨伞”时，你应说：

[ ]

A. I have an umbrella.
B. I have a umbrella.
C. I has an umbrella.1. A 2. A 3. A