26．—A number of foreigners come to see the Great Wall every year.
—Yes, It’s only famous and beatiful but also the ______ of China.
A. capital B. mark C. symbol D. sign
27. —Oh ,mu gpd! I ______ my friend’s mother the wrong way.
—You ______ what you were supposed to do first.
A. greeted to; should ask B. greeted to; should have asked
C. greeted; should have asked D. greeted; supposed to have asked
28. People in Korea and Japan are supposed to bow when they meet ____ the first
A. at B. in C.doring D. for
