Exercise 5. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word orphrasethat best fits eachof the numbered blanks from 21 to 25.
Located in central Africa, Lake Victoria is a very unusual lake. __(21)__ of the largest lakes in the world; it is also one of the youngest. Estimated to be about 15,000 years old, it is a relative baby compared with Earth’s other very large lakes, __(22)__ more than two million years old. Yet judging by the variety of life in it, Lake Victoria __(23)__ a much older body of water. Usually, lakes need a much longer time __(24)__ by a diverse array of life-forms. It is common for new lakes to contain only a small number of species. Lake Victoria, however, is packed with colorful fish, most notably, cichlids. There are __(25)__ 500 different species of just this one type of fish.
(From:https://www.ets.org/toefl_junior/prepare/standard_sample_questions/language_form_and_meaning)
(21) 
A.Not only is it one   
B.One is it only not
C.Is it one not only   
D.It not only one is

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Exercise 6. Read the following passage and write the letter A, B, C or D on the top of the first page to indicate the correct answer to each of the questions from 26 to 30.
Founded after World War II by 51 "peace-loving states" combined to oppose future aggression, the United Nations now counts 192 member nations, (26)             its newest members, Nauru, Kiribati, and Tonga in 1999, Tuvalu and Yugoslavia in 2000, Switzerland and East Timor in 2002, and Montenegro in 2006.
United Nations Day has been (27)           on October 24 since 1948 and celebrates the objectives and accomplishments of the organization, which was established on October 24, 1945.
The UN (28)            in peacekeeping and humanitarian missions across the globe. Though some say its (29)             has declined in recent decades, the United Nations still plays a tremendous role in world politics. In 2001 the United Nations and Kofi Annan, then Secretary-General of the UN, won the Nobel Peace Prize "for their work for a better organized and more peaceful world."
Since 1948 there have been 63 UN peacekeeping operations that are currently under way. Thus far, close to 130 nations have contributed personnel (30)            various times; 119 are currently providing peacekeepers. As of August 31, 2008, there were 16 peacekeeping operations underway with a total of 88,230 personnel. The small island nation of Fiji has taken part in virtually every UN peacekeeping operation, as has Canada.
(Source: https://www.examenglish.com/PTE/pte_academic_reading_4.htm, December 10th, 2017)
(29) 
A.consequence   
B.meaninglessness     
C.awareness               
D.influence