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.

Fact
The shape of plant collenchyma cells and the shape of the bubbles in beer foam are the same - they are orthotetrachidecahedrons.      .. More >>