Completed the teacher to answer the answer by opening the Track CD1/23 from 23 pages in the textbook, students listen to Ex.5 answers the teacher can open the CD again for pronunciation practice by students.
Then the teacher correct answers by opening CD1 / Track 23 of the next 23 Ex.5 textbooks to students to answer teachers' CD might open again for students to practice pronunciation.
Then teachers reveal the answer with the launch of CD1 / Track 23 from textbooks, page 23 Ex.5 students to listen to teachers เพื่อตรวจ answers may open. CD again so that students practice pronunciation.