Tourism, _____ it brings in money to a country, can also result in damage to the World Heritage sites there[ ]

It’s bad manners to laugh _____ others when they are _____ trouble.

1.－Do youwant tea or coffee － _____. I really don’t mind.

The novel was completed in 1978， the economic system has seen great changes．

Why not go travelling— I can’t afford it. _____ the cost, it will take a lot of time.