[ Grammar ]
A convoy of trucks __________ down the highway.
A. is roaring
B. are roaring

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Common & Proper NounsConditional Sentences and Verb FormPresent Perfect Continuous TenseIndefinite ArticlePast Perfect Tense and Past TenseTenses and Verb FormsGrammar Like & Linking VerbVerb Tenses and Subject Verb AgreementAdverbs of Time and PlaceInfinitives or GerundsOther quiz:
Degree of Comparison › ViewNadya thinks that science is the … subject.
A. most difficult
B. more difficult
C. more easy
D. easier
Grammar › View
Why do you always look so _____? Is your life really that bad?
A. amazed
B. amazing
C. worrying
D. worried
Subordinating Conjunctions › ViewYou will succeed _________ you work hard.
A. until
B. because
Grammar › View
She didn’t come to the party yesterday. She _____.
A. may forget the address
B. must have been forgotten the address
C. must forget the address
D. must have forgotten