找出下列不同类的单词，将其编号写在前面的括号里。
( )（1）A.housework B. homework C. apple
( )（2）A.sad B. monkey C. upset
( )（3）A.bring B. interesting C. surprised
( )（4）A.why B. how C. cars
( )（5）A.apple B .hamburger C.pie
根据图片，做出选择。(10分) 
A．It is in the south of China. B．It's in Xi'an.
The Great Wall is the ________ wall in the world.
A．longest B．longer C．long
They will ________ play football.
A．too B．either C．also
We're ________ to visit Beijing.
A．go B．going C．to go
________the holidays，Mary is going to Harbin.
A．By B．To C．During