A: Don’t play with the dog. It always excites him .
B: I think he’s _____ because he’s having fun.
a. exciting
excited

Random Topics:
Present Perfect and Past SimpleIf ClausesVerb Types and TensesVerb FormHave GotAdverbs and Time ExpressionsReported Speech and Reported QuestionsAdjective + to + VerbReported Speech and TensesGerunds and ModalsOther quiz:
Grammar › ViewDoes he like to work on the computers?
A. No, he isn’t.
B. Yes, he works.
C. Yes, he does.
D. Yes, he likes.
Preposition › View
It was so noisy outside that she couldn’t concentrate________her work.
A. in
B. at
C. with
D. on
Present Tense › ViewHello everybody. Let me … my self.
A. introduces
B. introduced
C. introducing
D. introduce
Comma › View
Which sentence is written correctly?
A. The anaconda the biggest snake in the world can weigh up to 250 kilograms.
B. The anaconda, the biggest snake in the world can weigh up to 250 kilograms.
C. The anaconda the biggest snake in the world, can weigh up to 250 kilograms.
D. The anaconda, the biggest snake in the world, can weigh up to 250 kilograms.