If you do not know the suspect not sure ask embarrassing question is not. Do not speak to each other in front of the people of Thailand, English. If you need to obtain permission before speaking, and it will be good if the English people are described in discussions to know what was talked in the story, and the students should try to practice interacting with practice questions back. Don't worry, that is not valid. If we say the wrong He will help fix our own. To try to speak as much English guests will help speed up development. Don't be reluctant to use the Sorry Excuse me Pardon???