21. Luckily, I got some...................advice on how to make a presentation on ‘For a better community’ from my class teacher. A. useless B. useful C. usefulness D. uselessness 22. Most of the students in that special school are making good progress, but Michael is a.................case. A. hopefully B. hopeless C. hopeful D. hopelessly 23. After I ______ the instructions, I knew what to do. A. read B. have read C. was reading D. had read 24. The boy fell while he ______ down stair. A. run B. was running C. ran D. is running 25. Mohammad _______about Halloween before he came to the US A. didn’t hear B. doesn’t hear C. hasn’t heard D. hadn’t heard