[ Grammar ]
It _____ working.
A. am not
B. is not
C. are not
D. not

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Have to/Has toBare Infinitive and To InfinitivePast ParticipleCan vs CouldPresent, Past and Future TenseRelative - ConditionalModals Posibility and ProbabilityPassive Modals, Impersonal PassiveVerb Tense, Pronouns and AntecedentsSimple Past Tense (was/were)Other quiz:
Articles and Quantifiers › ViewA: Do you have ______ jokes to tell us? B: Yes, ______.
A. any/a few
B. some/few
C. any/a little
Conjunctions › View
The team was losing; __________, they managed to win the game in the last minute.
A. because
B. therefore
C. nevertheless
D. otherwise
Vocabulary › ViewAt right angles to a horizontal plane; in a direction, or having an alignment, such that the top is directly above the bottom is the definition of what word?
A. upright
B. vertical
C. perpendicular
Grammar › View
Select the correct spelling.
A. karbon
B. carbon
C. carbone
D. carbonne