[ 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:
Noun Verb Agreement › ViewChoose the correct verb that agrees with the subject: The crowd (cheer/cheers) for their team.
A. cheer
B. cheers
C. cheered
D. cheering
Vocabulary & Grammar › View
Bailey ____________ wear glasses all the time – she just wears them for reading.
A. has to
B. doesn’t have to
C. should
D. shouldn’t
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
