题干
I'm your English teacher Helen Green. You can call me _______.
A：Ms. Green
B：Mr. Helen
C：Ms. Helen
D：Mr. Green
答案(点此获取答案解析）
A
I'm your English teacher Helen Green. You can call me _______.
A：Ms. Green
B：Mr. Helen
C：Ms. Helen
D：Mr. Green
若
，求