Final answer:
The sentences are corrected by using the appropriate verb forms for singular and plural subjects.
Step-by-step explanation:
In sentence (A), the subject 'chief' is singular and should be paired with the singular verb 'was' instead of 'were'. Therefore, the correct sentence should be: 'The chief, with all his men, was massacred.'
In sentence (B), the subject 'number' is singular and should be paired with the singular verb 'has' instead of 'have'. Therefore, the correct sentence should be: 'A number of interesting suggestions has been given.'
In sentence (C), the subjects 'headmaster' and 'assistant masters' are joined by 'nor', which indicates a negative statement. Therefore, the verb should be singular to match the negative sense. Consequently, the correct sentence should be: 'Neither the headmaster nor the assistant masters was present.'
In sentence (D), the subject 'slow and steady' is plural and should be paired with the plural verb 'win' instead of 'wins'. Therefore, the correct sentence should be: 'Slow and steady win the race.'
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