用所给词的正确形式填空. 1. I have two ______ (dictionary). One is English-Chinese dictionary, and the other is Chinese-English dictionary. 2. A: What's the result of the race, Mary? B: Jane is the ______ (one) in the race, Barbara is the ______ (two) and I am the ______ (three). 3. The Yellow River is the second ______ (long) river in China. 4. The boy is old enough to ______ (dress) himself. 5. The weather in Beijing is quite ______ (difference) from that in Guangzhou. 6. I'm very ______ (interest) in that ______ (interest) story. 7. It's more ______ (convenience) to take a taxi to the station than take a bus, but too expensive. 8. Be careful! Put the secret letter in a ______ (safety) place. 9. Lucy is ______ (jealousy) of her friend's beauty. 10. Liu Xiang and Yang Liwei are ______ (hero) in different fields.