Final answer:
The correct choices are 'was' for question 32, 'mathematics' for question 33, and 'don't' for question 34. These selections are based on the rules of subject-verb agreement and the specific context of each sentence.
Step-by-step explanation:
Understanding Subject-Verb Agreement
For question 32, the correct verb to use is 'was'. 'Meat and potatoes' is considered a single unit, much like 'red beans and rice', hence it requires a singular verb. The sentence should read, 'Meat and potatoes was my grandfather’s favorite meal when he was young.'
In question 33, the word 'mathematics' is a singular noun despite ending with an 's'. Phrases like 'mathematics is important' show that it takes a singular verb. Therefore, 'mathematics' is the correct answer.
Question 34 asks for a plural contraction. The plural contraction listed is 'don't', which is the contraction for 'do not'. It can be used with plural subjects, as in 'They don’t like running.' Hence, 'B. don’t' is the correct answer.