[ Tenses ]
They haven’t studied the subject.
A. Simple Present Tense
B. Present Continuous Tense
C. Present Perfect Tense
D. Simple Future

Random Topics:
Vocabulary and TensesRoot WordThings in EnglishVerb + InfinitiveWill & Be going toGrammar, Conditional Sentences, VocabularyTenses PracticeModal VerbsProverbsAlong & AgainstOther quiz:
Tenses › ViewThis time tomorrow________on the beach sunbathing and drinking freshly squeezed fruit juice!
A. I’ll have been lying
B. I will lie
C. I will be lying
D. I will have lain
Grammar › View
Jupiter __________________________________ planet in our solar system.
A. the most big
B. the biggest
C. bigger
Grammar › ViewHe …(read)… his newspaper this morning.
A. read
B. reading
C. readed
Mixed General Quiz › View
The house was so damaged that it was decided to ___ it to the ground and rebuild
a. laze
b. raze