John and Mary / not / skate
A. John and Mary isn’t skating.
B. John and Mary aren’t skating.
C. John and Mary aren’t skateing.

Random Topics:
Adjectives, Adverbs, and PrepositionsPreference & Future TensePRESENT SIMPLE vs PRESENT CONTINUOUS + QUANTComparative - SuperlativeInfinitivePresent/Future/Past Simple/Present PerfectVerbs: Action, Linking, and HelpingTypes of Sentence StructuresPresent Simple x Present ContinuousThe Structural Types of SentencesOther quiz:
Tenses › ViewWhen _____ this house? You never told me about it.
A. are you buying
B. do you buy
C. did you buy
D. were you buying
Grammar › View
I will ___ to Italy next year
A. goo
B. went
C. gone
D. go
Comma › ViewChoose the correct sentence.
A. Top Gear has three presenters Jeremy Clarkson, James May and Richard Hammond.
B. Top Gear has three presenters: Jeremy Clarkson, James May and Richard Hammond.
C. Top Gear has three presenters, Jeremy Clarkson, James May and Richard Hammond.
D. Top Gear has three presenters; Jeremy Clarkson, James May and Richard Hammond.
IELTS Vocabulary › View
to produce something in such a way that it makes profit
A. produce profitably
B. advance payment
C. calculate
D. destruction