简单的汉译英!我急用!

Who is this young man?
He is one of the teachers in this school.
Who is that lady?
She is the principal of this school.
Who are these children?
They are students in Grade 2.
Who are those people?
They are the parents of the students.

这个小伙是谁?
Who is this little guy?
他是这个学校的一个教师.
He is one the the teachers of the school.
那个女士是谁?
Who is that lady?
她是这个学校的校长.
She is the principle of the school.
这些孩子是谁?
Who are these kids(children)?
他们是二年级的学生.
They are second-year class students.
那些人是谁?
Who are those people?
他们是学生家长.
They are the parents of the students.

他都说小伙子是young man了，怎么还都guy呢？而且guy是很随便的说法指一个男人，经常翻译成“家伙”，不是对应汉语里小伙子的。
这个小伙是谁?
Who is this young man?
他是这个学校的一个教师.
He is a teacher in this school.
那个女士是谁?
Who is that lady?
她是这个学校的校长.
She is the principal\headmaster of this school.
这些孩子是谁?
Who are these k