4 Choose the correct answer. ► If you explain something, you make it easy to say/understand . understand 1 If you revise something, you say it again/study it again . ____ 2 If something works, it is successful/difficult . ____ 3 If you experiment with something, you try something/find something . ____ 4 You can do/make a mistake. ____ 5 A method is an opportunity to do something/a way of doing something . ____ 6 A chat is a formal/an informal conversation. ____