[ Tenses ]
Recognize the past perfect continuous tense in the sentence: They had been playing football for two hours.
A. They have been playing football for two hours.
B. They had been playing football for two hours.
C. They were playing football for two hours.
D. They had played football for two hours.

Random Topics:
Simple Present & Present ProgressiveConjunctive AdverbsGerunds and ModalsAdverbs, Modals, Preposition of timeProgressive Verb TensesBecause / soReflexive Pronouns & Modal VerbsGrammar Error Correction (Simple Present Tense)Verbs + Gerund or InfinitiveConjunctions, Prepositions and InterjectionsOther quiz:
Vocabulary & Grammar › ViewThe demand for skilled labor has forced many companies to ___ work to other countries.
A. optimize
B. outsource
C. outweigh
D. conduct
Grammar › View
My brother ___ to school.
A. go
B. goes
Present Simple › View“Tom doesn’t _________ Jerrry.”
A. like
B. likees
C. likess
D. likes
Subject Verb Agreement › View
Some of the books on the shelf _____ dusty.
A. is
B. are
