[ Present Perfect Tense ]
They are studying grammar right now
A. They has studied grammar
B. They have studied grammar
C. They have studied grammar right now

Random Topics:
Grammar, Literature, and VocabularySuffixes and TensesComparatives and Past Perfect TenseGerunds and ModalsTypes of Sentence StructureAdverbs of Degreea, an, the, zero articleMixed TensesCoordinating ConjunctionTenses, Tag Questions, Phrasal VerbsOther quiz:
Tenses › ViewWho was the first woman to win a Nobel Prize (in 1903)?
A. Mary Curie
B. Cleopatra
C. Adele
D. Sandra Bullock
Grammar › View
Tom and his family had ____________ exciting holiday last December.
A. a
B. an
C. the
D. many
Vocabullary Test › ViewSound symbolism means that we often _____ the meaning of a word from its sound.
A. guess
B. judge
C. imagine
D. expect
Past Tenses › View
I __________ (work) for the company for five years before I got promoted.
A. had workd
B. had been working
C. was working
D. worked
