Completing the sentences with the correct grammatical words is as follows:
6. We must study hard A. for the exam.
7. We must study hard D. to prepare for the exam.
8. Why you are very happy today? A. I know it's your birthday.
9. D. I am going to study hard for our next text.
10. If I could C. be an animal, I D. would be a lion.
What are parts of speech?
Correct grammatical words use the right parts of speech to fit the grammatical context.
The parts of speech in English grammar include:
- Noun
- Pronoun
- Adjective
- Verb
- Adverb
- Preposition
- Conjunction
- Interjection.
For example, it is not correct grammar to use a wrong preposition, e.g. "of" when "for" should be used.
Thus, the sentences have been completed with the correct grammatical words.
Learn more about parts of speech at https://brainly.com/question/721326
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