The verb must agree with the subject in number. ... When you have a singular and plural subject joined by or or nor, the verb will agree with the closest subject. Collective Noun Rule. A collective noun represents a group of things that can be expressed as a singular or plural concept, depending on how the word is used.
The author uses cause and effect because it helps to show how scientists benefited and how we were able to learn new and interesting facts
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Washington took command of an unprepared army in 1775 and entered into a difficult war that lasted six years.
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Leia and I are sometimes teased about our fears.