哪个词是形容词而另一个词是介词?

1. The cat is shy and afraid of strangers.
2. The book is old and has yellowed pages.
3. The dog is large and strong.
4. The car is fast and efficient.

Answer:

1. Shy is an adjective, while fearful is a verb.
2. Old is a numeral, while yellowed is an adjective.
3. Large is an adjective, while strong is a verb.
4. Fast is an adverb, while efficient is an adjective.