How ______ is the Great Wall? A. high B. short C. long
( ) I can see ________ the duck.
( ) ________ are all good students in schools.
( ) The film is very boring. ________ people like it
( )—Is it serious, doctor? —Don’t worry. ________ serious.
( )—Is this postcard ________? —Yes, It’s ________. It’s from ________ friend.