Teachers and students to help each other solve the exercises and random, each student has his or her own answer to reveal how each person can hear and vocabulary to write a few words per person.
Teachers and students to solve exercises. And randomly assigned to each student to answer their own answers that are able to listen and write a few words each.
Teachers and students work together to solve the exercises. And random each student to answer their answers, each one can listen and write the vocabulary words can คนละกี่ .