số học sinh nữ là 6: (4-5)x4=24

so hoc sinh nam la 6x5=30

tong so hoc sinh la 24+30=54hoc sinh

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.

          When you read something in a foreign language, you frequently come across words you do not fully understand. Sometimes you (31) ______ the meaning in a dictionary and sometimes you guess. The strategy you adopt depends very much upon the degree of accuracy you require and the time at your disposal.
          If you are the sort of person who tends to turn to the dictionary frequently, it is (32) ______ remembering that every dictionary has its limitations. Each definition is only an approximation and one builds up an accurate picture of the meaning of a word only after meeting it in a (33) ______ of contexts. It is also important to recognize the special dangers of dictionaries that translate from English into your native language and vice versa. If you must use a dictionary, it is usually far safer to consult an English-English dictionary.
          In most exams you are not permitted to use a dictionary. (34) ______ you are allowed to use one, it is very time-consuming to look up words, and time in exams is usually limited. You are, therefore, forced to guess the meaning of unfamiliar words. When you come across unknown words in an exam text, it is very easy to panic. However, if you develop efficient techniques for guessing the meaning, you will overcome a number of possible problems and help yourself to understand far more of the text than you at first thought likely.
          Two strategies which may help you guess the meaning of a word are: using contextual clues, both within the sentence and outside, and making use of clues (35) ______ from the formation of the word

Điền ô số 33

A. variation

B. multiple

C. diversity

D. variety

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