Don’t worry；you’ll the exam；it’s a piece of cake．

I saw a boy in the supermarket yesterday, reminded me of my good friend.

We’re doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.

They got _____of the car,went_____a gate and walked_____a path.

Now mobile phones are not so expensive as they _______ to be.