Check out your knowledge!
Please write down the number of the question and the letter of your answer to check if it was right afterwards!
right answers:
1) c; 2) a; 3) c; 4) d; 5) b; 6) a; 7) b; 8) d; 9) b; 10) c; 11) a; 12) b; 13) d; 14) c; 15) d; 16) a; 17) c; 18) b