The correct adjectives that can be used in the sentences will be:
- He likes participating in the games. He is so <u>enthusiastic</u>.
- Our exam yesterday was <u>perplexing</u>.
- My cousin was so <u>sanguine </u>that we slept very late last night.
- Maria was <u>thrifty </u>for buying these second-hand bags.
- Jayson uses only a metal straw to drink. He is <u>weird</u><u>.</u>
- She has grown up to be a <u>book geek</u> since she just likes to study all the time.
- Arang, our toddler neighbor, asks a lot of questions. She is so <u>inquisitive</u>.
- Jessica stays late every night reading books about philosophy. She has become more <u>geriatric </u>than her age.
- The gifts Nathan gave to his workers were <u>lavish</u>.
- Our new teacher is <u>placatory</u>.
It should be noted that adjectives are the words that are used to describe nouns or pronouns.
In this case, the adjectives used are important in turning the sentence into grammatically correct positive statements.
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