1, Đặt câu hỏi cho từ gạch chân :
1.____________________________?
   The Grand Canyon is in Ariona , USA.
2.____________________________?
   The Atacama desert receives 1m m  of rain per year .
3.____________________________?
   The Nile River is 6,650 kilometers long .
4.____________________________?
   Mt.Everest is over 60 million years old.
5.____________________________?
   Victoria Falls . Victoria Falls are twice as tall as Niagara Falls.
6.____________________________?
   Thien Duong Cave was discovered in 2005 
7.____________________________?
   Visitors can get to Angel Falls by boat.