Question

    In the following questions each sentence is divided

    into four parts. Read each sentence to find out if there is any error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer if there is no error, mark (e) as your answer. Science really begins when general principles (1)/ has to be put to the test of fact (2)/ and when practical problems and theoretical relations (3)/ of relevant factors are used to manipulate reality in human action (4)/ No error (5)
    A 3 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 4 Correct Answer Incorrect Answer
    D 1 Correct Answer Incorrect Answer
    E 5 Correct Answer Incorrect Answer

    Solution

    The verb has should be changed to have to agree with the plural subject general principles.

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