大学体验英语三tree_frog.ppt

Department of College English Language Points 3. challenge : n/v. (sth with) the quality of demanding competitive action, interest, or thought Acquiring a foreign language in three months’ time is really a challenge to anyone. Tr. 她要求报社证实它的故事. She challenged the newspaper to prove its story. 1. What is the authors purpose in writing the story? A) He wants to tell the story of an extraordinary frog. B) He wants to tell readers the characteristics of frogs. C) He wants to show that frogs and humans can live together. D) He wants to encourage readers to fight against pollution. 1. What is the authors purpose in writing the story? A) He wants to tell the story of an extraordinary frog. B) He wants to tell readers the characteristics of frogs. C) He wants to show that frogs and humans can live together. D) He wants to encourage readers to fight against pollution. Ex. 12 Choose the best answer to each question with the information from the passage. Ex. 12 Choose the best answer to each question with the information from the passage. 2. Finally the author realized that the frog preferred staying in the studio rather than in the greenhouse because _____. A) he wanted to remind the author that it’s time to take actions against pollution B) he enjoyed being there surveying the world through computer with the author C) he loved the tone of the computer which sounded like other frogs D) he was afraid the pollution outside may affect his skin 2. Finally the author realized that the frog preferred staying in the studio rather than in the greenhouse because _____. A) he wanted to remind the author that it’s time to take actions against pollution B) he enjoyed being there surveying the world through computer with the author C) he loved the tone of the computer which sounded like other frogs D) he was afraid the pollution outside may affect his skin 3. Frogs are called an “indicator species” because _____. A) their lungs are turn