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such things of __________ you are not sure. A. which C. asD. those 2. Is this the factory __________ you visited the other day? A. that D. the one 3. Is this factory __________ some foreign friends visited last Friday? A. that B. whereD. the one 4. Is this the factory __________ he worked ten years ago? A. that B. where C. whichA. that B. where C. in which D. in that 6. The freezing point is the temperature __________ water changes into ice. B. on thatA. how you have observed C. that you have observed A. because B. that D. which 10. That tree, __________ branches are almost bare, is very old. A. whose B. of which A. asC. that D. what 13. We’re talking about the piano and the pianist __________ were in the concert we attended last night. A. which C. who D. that 14. The girl __________ an English song in the next room is Tom’s sister. A. who is singing B. is singing C. sang C. that learns D. who learn 16. Anyone __________ this opinion may speak out. B. that against C. who is against D. who are against 17. Didn’t you see the man __________? C. I nodded to him just now D. I nodded to just now 18. Can you lend me the novel __________ the other day? C. which you talked with D. you talked about 19. Is there anything __________ to you? A. that is belonged D. which belongs 20. “How do you like the book?” “It’s quite different from __________ I read last month.” C. the one C. some D. the others 22. The train __________ she was travelling was late. A. which B. where B. in which C. that D. about which 25. It’s the third time __________ late this month. A. that you arrived B. when you arrived C. that you’ve arrived D. when you’ve arrived 26. It was in 1969 __________ the American astronaut