填空题

Directions: In this section you will hear a short lecture. Listen to the recording and complete the notes about the lecture, You will bear the recording twice. After the recording you are asked to write down your answers on, the Answer Sheet, You now have 25 seconds to read the notes below.
First, when Cassie quotes an author directly, she uses ______ (2 words) around the words.

【参考答案】

quotation marks