1. intelligent (heading) a. clever
b. modern

2.essential (para l)
a. necessary
b. wanted

3.latest (para 1)
a. very last
b. most recent

4. far-sighted (para 2)
a. being able to see a long way
b. able to imagine future needs

5. sophisticated (para 2)
a. advanced
b. old-fashioned

6. solution (para 3)
a. touch
b. answer

7. conventional (para 3)
a. traditional
b. new

8. similar to (para 4)
a. like
b. different from

9. virus (para 6)
a. something which causes damage
b. something which helps

10. afford (para 6)
a. have enough time for
b. have enough money for