15.The station building used to be a high wooden(facility/carriage/complex/structure)with a curved roof. 16.After I found all the information I needed, I(turned off/switched on/looked for/put off) the computer. 17.It’s important to (destroy/ignore/remain/preserve) the wonders of the world so that future generations can see them with their own eyes. 18.Production methods in the village are normally (passed away/passed out/passed up/passed down)from ancestors to the younger generations. Find and correct the mistake in each sentence 19.He works much more hard for his exams than he does for his normal school work. 20.They are getting used to walking to school in two months. Give the correct form of the words given in brackets. 21.This is a very beautiful piece of ____________ ( embroider) 22.Many ethnic people in mountainous areas are______ they can’t read or write. (illiteracy)