II. Fill in the blank in each of the following sentences with a suitable preposition or adverb. ( 2*20=20 points ) 1. These teenagers don ’ t know much of the world yet; that ’ s why they are so easily taken ______ . 2. The stars are so hot that they give ______ great light and heat . 3. While studying, fix your mind on what is really important, or you will end ______ remembering nothing . 4. When the old man climbed to the sixth floor, he was tired and ______ breath . 5. Modern forms of transportation and communication have done much to break ______ the isolation of life in Alaska . 6. I agree to his suggestion ______ the condition that he drops all charges. 7. Amateurs may be unable to tell the fake ______ the original painting. 8. Have you been in contact ______ your former English teacher recently? 9. Nobody wants to be made fun ______, especially in public. 10. The British constitution is ______ a large extent a product of the historical events described above.