What do you know about the environment?
Use these exercises below to develop your grammar, vocabulary, reading and listening.
Present Perfect Simple and Continuous Explanation: http://learnenglish.britishcouncil.org/en/quick-grammar/present-perfect-simple-and-present-perfect-continuous
Present Perfect Simple and Continuous Exercises:
Direct / Indirect Questions Explanation:
Direct / Indirect Questions Exercises:
Modals of Ability:
Animal Conservation: http://learnenglish.britishcouncil.org/en/magazine/animal-conservation
Winter In Siberia: http://www.esl-lounge.com/student/reading/4r5-siberian-winter.php