The dog ……….. barking at the stranger.
A. is
B. are
C. the

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Prepositions & Modal VerbsAdjective + to + VerbSimple Compound and Complex SentencesConnectorsZero ConditionalNoun ClausePresent Simple & ContinuesFigurative LanguageGrammar-Verbs & Nouns Singular, Plural, GenderPast Perfect and Past Perfect ContinuousOther quiz:
Comma › ViewWhich 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.
Adverbs of Manner › View
Maria was ____ upset by her low grade because she is an excellent student.
A. clearly
B. surprisingly
C. hopefully
Tenses and Comparisons › ViewHey Rina, can you help Joko figure out the comparative form of the adjective ‘happy’? Let’s see if you can find the right answer!
A. happier
B. happiest
C. happyest
D. more happy
Grammar for TOEFL › View
Rarely _____ located near city lights or at lower elevations.
A. observatories are
B. are
C. in the observatories
D. are observatories
