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_________________________________ 5. Whose shirt is it? Do you know? _______________________________________________________ 參考答案 Unit 3 I. 1. which 2. when 3. why 4. that 5. who 6. whose 7. whether 8. where 9. how 10. if/whether II. 15 CDAAC III. 1. Wang Hai told me why he didn’t go mountain biking yesterday afternoon. 2. I don’t know who invented the first car. 3. I really don’t know how soon the bridge will be finished. 4. She wanted to know if/whether her coat would be ready the next day. 5. Do you know whose shirt it is?