18. We should give unused clothes to_____________to help the people in need. A. charity B. factory C. market D. hospital 19. My head hurts. I need to take a ………. A. sun cream B. backpack C. walking boots D. painkiller 20. She is always____________ at school. She spends most of the time studying A. hard-working B. careful C. lazy D. funny 21. “I’ve just received a scholarship”- “__________”. A. Well B. Thank you C. Really D. Congratulations 22. A hi-tech robot will help us __________ children while we are away. A. look after B. look in C. look at D. look out 23. I didn’t go to school yesterday ___________ I was ill A. although B. so C. because D. but 24. If we ________cutting down the trees, we can’t prevent floods and other natural disasters A. don’t stop B. stop C. won’t stop D. will stop