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Choose the underlined part that needs correction in the following ques . 20. Water from power stations may cause water in rivers and lakes hotter . A from B. stations C. cause D. rivers 21. Researchers haven't found out what has led in the pollution of the river A found B. what C. in pollution 22. At first had difficulty to understand my friends from English - speaking countries A. first B. had to understand D. from

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mcarc09

The underlined parts that need correction are the following:

20. C. cause

21. C. in

22. C. to understand

  • 20. The verb "cause" does not match the rest of the sentence - we cannot "cause something hotter". We can, however, "make something hotter," which would be the correct verb to use.
  • 21. The preposition "in" does not go with the verb "to lead", used in the sentence in the present perfect tense. The best preposition to be placed there is "to".
  • 22. After the phrase "have difficulty", the next verb should be used with -ing. In the sentence, the verb "to understand" is incorrect.

In conclusion. Each sentence has a different kind of error. The correct forms for each sentence are:

20. Water from power stations may make water in rivers and lakes hotter.

21. Researchers haven't found out what has led to the pollution of the river.

22. At first [I] had difficulty understanding my friends from English-speaking countries.

Learn more about prepositions here:

https://brainly.com/question/1957777?referrer=searchResults

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