[ Present Perfect Continuous ]
The machines _____ working today.
A. don’t
B. aren’t
C. isn’t
D. not

Random Topics:
Too or EnoughPresent or Past TensesAdverbs of TimePhrases & ClausesSuffixes and TensesComparativeFOR & SINCESingular and Plural NounsGrammar - Present Perfect TensePast and Perfect TensesOther quiz:
Grammar › ViewThere is a large ___ of fake news in some tabloids.
A. lot
B. amount
C. some
Conjunctions › View
What is the conjunction word in the sentence?
We can have your party at home or at the park.
A. and
B. but
C. or
Grammar & Vocabulary › ViewThat situation is really strange, but it does not _______ me.
A. astonish
B. astonished
C. astonishing
D. astonishment
Adverb Clause › View
__________ the data is accurate, our conclusions should be reliable.
A. After
B. Until
C. Although
D. Because
