Which sentence uses the correct form of the word “much”?

Choose the correctly punctuated sentence:

Which of these sentences is grammatically correct?

Which of the following is the correct way to use “there,” “their,” and “they’re”?

Choose the correct comparative form:

Which sentence is correct?

Choose the correct sentence using the past perfect tense:

Which of the following is the correct use of a comma?

Choose the sentence with the correct subject-verb agreement:

Which of the following sentences is in the correct tense?