Unit 7. Ecological systems

a. Match the words to the definitions. b. Now, read about cane toads and fill in the blanks.a. Listen to Ben and Anna talking about the Northern Pacific sea star. Is the sea star still a problem in Australia?b. Now, listen and answer.

a. Complete the words.b. Fill in the blanks.a. Read Donna’s blog post about her vacation and choose the best title. b. Now, read and circle True or False.a. Write sentences using the prompts.

a. Listen to Terry speaking. Where do you think he is?b. Now, listen and circle.a. Read the essay and choose the best introductory sentence.b. Now, read and answer the questions.

You will hear five short conversations. You will hear each conversation twice. There is one question for each conversation. For each question, choose the correct answer (A, B, or C).