[ Present Perfect Simple & Present Perfect Continuous ]
The scientist ___ their research yet
A. haven’t finished
B. haven’t been finished

Random Topics:
1st & 2nd ConditionalsPast Narrative TensesPresent Simple and ContinuousNouns, Pronouns, Antecedents, and Singular and PluralPresent and Past TensePassive Voice - Past SimplePast Simple TensesModal Verbs for PossibilityIntermediate GrammarPast or Present Verb TenseOther quiz:
Subject Verb Agreement › ViewThe committee ________________ divided over the issue of whether to make reforms or not. The chairman will cast his decisive vote.
A. were
B. are
C. was
D. is
Infinitive and Gerunds › View
It’s important ____________ if you want to be sure of a seat.
A. To book
B. Book
C. Booking
Conjunctions › ViewWhich conjunction would best complete the sentence: “He studied hard, ___ he passed the exam.”
A. or
B. so
C. but
D. since
Grammar › View
If he ___________ this lottery ticket, he would’ve won a lot of money.
A. had bought
B. bought
C. has bought
D. would buy
