6.It is wonderful to see flowersin different colours after a long bleak winter.

11.If we teachers believe in education and ( )students ' growth , our labor will eventually pay off .

10.The teacher drew a ( ) ( ) between the human heart and a pump to help students understand how it works .

9. The new law tries to maintain a balance between national interests and ( )rights .

8.After I bought this iPad , I( ) my old computer .

7. They are working on a new ( ) , which calls for a ( ) ( )amount of time and energy .

6. Jack had a hard time grasping the basic ( ) of mathematics .

5.At yesterday ' s sports meet , my roommate Brian ( ) of our school in the men ' s 100- meter race .

4.It' s one thing to learn the rules of politics from books . It is quite another to get into the ( ) world of real - life politics .

3. The ship , with 1,000 passengers( ) , was bound for New York .

2.His plan is to design a new model , into which some( )of previous models will be ( ).