填空题 Listen to the conversation and complete the following sentences with NO MORE THAN TWO WORDS.

填空题 Ailie’s lecture focuses on 1 .

填空题 Reading 1 can help Ailie find out an attractive topic.

填空题 Articles, books and the 1 are sources of the knowledge on a lecture topic.

填空题 It’s important to vary your 1 and use different information when deliver a lecture.