[ Tenses ]
They __ (work) on the project for several months now.
A. are working
B. work
C. have been working
D. have worked

Random Topics:
ConditionalPresent Simple/AffirmativeAdjective vs AdverbIf/Unless - Conditional type 1Preposition of DirectionGrammar (want to/ need to/ have to)Vocabulary and IdiomsBe going to / WillVerb AbilityPast PerfectOther quiz:
Grammar › ViewEmily Dickinson—who was born in Amherst, Massachusetts—was an American poet.
A. essential
B. nonessential
Mixed General Quiz › View
Ring the church ___ !
a. bell
b. belle
What are you afraid…………?
A. to
B. with
C. of
Grammar and Vocabulary › View
When ________ you visit the new school?
A. did
B. had
C. went
