5.The country celebrates its independence……….the second………..September ( on-in/ on-on/ on-of/ in-of) 6………..you study harder, you won’t pass the final exam. ( if/ unless/ without/ if not) 7.They have…….for two years but this was their first meeting. ( worked/ written/ corresponded/ talked) 8.The little boy has no difficulty……on his own. ( to get dressed/ getting dressed/ to get dressing/ getting dressing) 9.Many people were injured when the building………( collapsed/ destroyed/ struck/ erupted) 10.The boys are different. I can’t………….the differences between them. ( tell / say/ speak/ talk)