Quizzes, tests, exercises and puzzles for English as a Second Language (ESL), English as a foreign language (EFL), Teaching EFL (TEFL), Test of EFL (TOEFL), English for speakers of other languages (ESOL), Teaching ESOL (TESOL), TOEIC.
Science Facts
Air conditioning systems are home to lots of nasty bacteria. And because they pump the same air around a building again and again, they are one of the best ways of spreading diseases to everyone in the building. .. More >>