Ll. 1.any
2.no
3.some
lll.1.You speak English, don't you ?
2.He is a very intelligent person, isn't he ?
3.They stayed at home yesterday, didn't they?
lV .telegraph system
horseshoe magnet
sound waves
V.Air -nitrogen.
oxygen.
carbon dioxide.
argon .
VI .exit -entrance
way in -way out
arrival- departure
VII.1.Did
2.Was
3.