Answer:
7. a
8. d
9. a
10. c
Step-by-step explanation:
7. A declarative sentence makes a statement and ends with a period.
8. A noun is a word used to identify, among other things, any of a class of people.
9. Although the adjective true is spelled with -e, the adverb truly is spelled without it.
10. Obscure means unclear, so the antonym for obscure is obvious.