It’s rude to laugh ______ others when they have trouble______ something.

Rock-climbing is a breathtaking activity,very popular nationwide among young people, cooperation as well as courage plays an important role.

We won’t give up ______________we should fail ten times

My parents want me to take_________maths lessons at the weekend, but I want to play and have fun.

Excuse me. I want to buy some stamps. Where can I find a post office– I know not far from here. You can easily find .