[ 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 › ViewChange the phrase into a possessive noun.
The toys belonging to the child
A. The childs’ toys
B. The child’s toys
Present Tense › View
We____ in the museum.
A. are
B. is
C. do
D. am
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
