Part A
Directions: You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer ― A, B, C or D, and mark it in your test booklet. You will have 15 seconds to answer the question and you will hear each dialogue ONLY ONCE.
听力原文：W: There are so many children at the school. I wonder how the teacher keeps track of them.
M: I used to get cold feet at the thought of teaching a class of 100. That's a fact.
What do we know from the conversation？

A. The man used to be a teacher.
B. The woman is teaching a class of 100 children.
C. The woman thinks it easy to teach.
D. The man thinks it quite difficult to teach.