The police are________to conclude that the cause of fire had been a cigarette end.

There is nothing wrong with using a credit card for purchases. It’s more _______ than carrying loads of cash.

Education in government colleges is very cheap, but if you go to the _____colleges, it is much more expensive.

Not everyone has realized what_______ important part the balance of________ nature plays in their life.

______to take this adventure course will certainly learn a lot of useful skills.