Answer:
Macbeth is concerned about Banquo's children. The witches said Banquo would father kings, and Macbeth would not. Macbeth worries Banquo's children will pose a threat to his rule, so he hires murderers to ambush Banquo and Fleance. Banquo dies but Fleance gets away
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These answers are correct!
Looking at the subject will help clarify the right verb.
7. "bark" is singular, therefore "has" is correct because it is singular
8. "cats and monkeys" is plural, therefore "have" is correct because it is plural
9. "summer camps" is plural, therefore "are" is correct because it is plural
