Question 9: Collecting cars is a(n) ________ hobby. It costs a lot of money. A. interesting B. cheap C. expensive D. unusual Question 10: Why don’t you take ________ a new hobby? A. up B. in C. over D. after Question 11: Drink _________water because it is very essential for your body. A. less B. more C. little D. many Question 12: How much time do you spend ________ the Internet per day? A. surf B. to surf C. surfing D. to be surfing Question 13: We are very excited ________ our 2018 Volunteer Program. A. about B. for C. in D. on Question 14: Many people donate to the Red Cross, a ________ organization that aids people free of charge. A. profit-making B. for-profit C. non-profit D. profitable .Question 15: ________ people usually live on the streets, under bridges, or in camps. A. Sick B. Homeless C. Elderly D. Disabled Question 16: Have you ever__________ volunteer work? A. do B. did C. does D. done