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Nội dung: <blockquote data-quote="Aquarius" data-source="post: 91596" data-attributes="member: 124704">1. What does the passage mainly discuss? A. Birds B. Insects C. Flowers D. Perfume   2. The orchid is unique because of A. the habitat in which it lives B. the structure of its blossom C. the variety of products that can be made from it D. the length of its life   3. The word "fused" is closest in meaning to A. combined B. hidden C. fertilized D. produced   4. How many orchid seeds are typically pollinated at one time? A. 200 B. 2,000 C. 20,000 D. 200,000   5 Which of the following is a kind of petal? A. The column B. The sepal C. The stem D. The labellum   6. The “labellum”  is most comparable to A. a microscope B. an obstacle course C. an airport runway D. a racetrack   7. The word "lure" is closest in meaning to A. attract B. recognize C. follow D. help   8 Which of the following is NOT mentioned as a means by which an orchid attracts insects? A. Size B. Shape C. Color D. Perfume   9. The word "their" refers to A. orchids B. birds C. insects D. species   10. Which of the following statements about orchids scents does the passage support? A. They are effective only when an insect is near the blossom. B. Harmful insects are repelled by them. C. They are difficult to tell apart. D. They may change at different times.         </blockquote>