Question

In questions 41-45 each sentence has four underlined words or phrases. The four underlined parts of the sentences are marked 1, 2, 3, 4. Identify the ONE underlined word or phrase that must be changed in order for the sentence to be correct. 

Choose the word or phrase which would best keep the meaning of the underlinedword or phrase of the original sentence.

Answer 1

41 - 1 - discovery 
42 - 3 - are 
43 - 3 - increases 
44 - 3 - powerful forces
45  4 - per cents