A．It is important to master a foreign language.B．Crossing one’s leg is impolite manner.C．It is important to master the language of a country as well as the manners there.D．Touching the head of an elderly person in Thailand is very polit
A．It is important to master a foreign language.
B．Crossing one’s leg is impolite manner.
C．It is important to master the language of a country as well as the manners there.
D．Touching the head of an elderly person in Thailand is very polit