21. Can you tell me who ...............this kind of machine? A. invented B. invention C. inventor D. inventive 22. Your teacher writes poems or stories,...............she? A. don’t B. won’t C. didn’t D. doesn’t 23. Excuse me. Can I................in this area? A. smoke B. smoking C. smoked D. to smoke 24. If he...............a student, he will get a discount. A. is B. was C. were D. will be 25. Can you turn..............the light? It’s too dark. A. on B. off C. in D. for 26. We can..............easily in the daylight. A. to read B. reading C. reads D. read 27. What can we do to spend less...............lighting? A. in B. on C. about D. of 28. She is very tired;................., she has to finish her homework. A. moreover B. so C. and D. however 29. Is he an actor ...............a singer? An actor. A. and B. or C. with D. so 30. I suggest ...............money for the poor people in our neighborhood. A. save B. to save C. saving D. saved