Đáp án C Giải thích: Thông tin nằm ở: “In fact, very few schools want to hire novices with little or no classroom experience and even if they are accepted, they are usually ill-paid.” Very few >< a great number of Dịch nghĩa: Theo đoạn văn, tất cả các câu sau đây là đúng TRỪ _____. A. Những người muốn trở thành giảng viên đại học cần bằng thạc sĩ. B. Một giáo viên cần phải nhận thức được thực tế rằng học tập đôi khi có thể là việc khó. C. Một số lượng lớn các trường ở Hoa Kỳ muốn thuê người mới với rất ít hoặc không có kinh nghiệm trong lớp học. D. Ở Mỹ, trước khi một người lên lớp, chương trình đào tạo thượng là cần thiết phải hoàn thành.
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions
Orchids are unique in having the most highly developed of all blossoms, in which the usual male and female reproductive organs are fused in a single structure called the column. The column is designed so that a single pollination will fertilize hundreds of thousands, and in some cases millions, of seeds, so microscopic and light they are easily carried by the breeze. Surrounding the column are three sepals and three petals, sometimes easily recognizable as such, often distorted into gorgeous, weird, but always functional shapes. The most noticeable of the petals is called the labellum, or lip. It is often dramatically marked as an unmistakable landing strip to attract the specific insect the orchid has chosen as its pollinator. To lure their pollinators from afar, orchids use appropriately intriguing shapes, colors, and scents. At least 50 different aromatic compounds have been analyzed in the orchid family, each blended to attract one, or at most a few, species of insects or birds. Some orchids even change their scents to interest different insects at different times. Once the right insect has been attracted, some orchids present all sorts of one-way obstacle courses to make sure it does not leave until pollen has been accurately placed or removed. By such ingenious adaptations to specific pollinators, orchids have avoided the hazards of rampant crossbreeding in the wild, assuring the survival of species as discrete identities. At the same time they have made themselves irresistible to collectors.
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