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| My friend Paul will never forget his chemical teacher. He was a little man with thick glasses, and he had a strange way of making his classes live and interesting. And his lessons were not easily forgotten. Paul remembers one of his first lesson from his teacher. After all the students were in a chemistry lab, the teacher brought out three bottles. One was full with petrol, one with castor oil and one with vinegar."Now watch carefully," said the teacher. He filled a cup with some the petrol, some of the castor oil and some of the vinegar. As the students watched him, he mixes the three together. After that, he held up one of his fingers and showed to the class. He then dipped it into the cup and said" You must do everything as I do it." | 1. _____ 2. _____ 3. _____ 4. _____ 5. _____ 6. _____ 7. _____ 8. _____ 9. _____ 10. _____ |
| Some of the doctors are paid almost _____ as the nurses. | |
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| A. twice as much B. much as twice C. as much twice. D. as twice much | |
| I haven"t seen _____ this since I began to collect stamps. | |
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| A. as old a stamp as B. as an old stamp as C. an old stamp such as D. a such old stamp as | |
| If you want to try some of the most _____ skiing in the world, you should try a visit to Kitzbuel, _____ in southern Austria. | |
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| A. challenged; located B. challenging; locating C. challenged; locating D. challenging; located |