单项选择题
A．follow the fashion B．enrich their mind C．do more exercise D．dress up in beautiful clothes
A．Telephone was invented by a French engineer. B．Roman soldiers sent the important message by spelling out the words. C．African soldiers shouted from tower to tower to pass message. D．Only by using telephone could people send speech sounds quickly.
A．you will feel that Americans do not seem very friendly B．you will be puzzled why Americans do not smile at you C．you will fail to notice that Americans are pleasant and happy D．you will find that Americans don’t have much sense of humor