With his wise thoughts about 　　nature and the world, Confucius (孔子) is considered

as a great thinker in 　　　　 history of China.

A. 不填；the                  B. the；the            C. 不填；不填        D. the；不填

 Canada is one of _____ largest countries in the world, ______ second only to Russia.

   A. the; the               B. the; a           C. a; the             D. the; 不填

Canada is one of _____ largest countries in the world, ______ second only to Russia．

       A．the; the                     B．the; a          

       C．a; the                   D．the; 不填

There is no power like ______ power of confidence, and there is no student as competitive as ______ student who trusts his own abilities.

       A. the; a      B. a; the      C. /; a         D. the; /

It is a usual practice for Billy Crystal to keep _______toothbrush in his pocket for ______ good luck.

A. 不填；the                     B. a；不填                   C.不填; a        D. a; the 

——Do you know what EU stands for ,Tommy?

——Sure.It stands for the European Union,        European political and economic organization that encourages trade and friendship between        countries that are members.

A.a;the                  B.an,the                C.a;the                  D.an;/

While he was investigating ways to improve the telescope, Newton made______ discovery which completely changed ______ man’s understanding of colour.

A. a; 不填                   B. a; the                      C. 不填; the                 D. the; a