[ Tenses, Determiners & Subject Verb Agreement ]
There aren’t ________ trains running now
A. some
B. any

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Vocabulary › Viewoverpopulation, pollution, burning fossil fuels, & deforestation that have triggered climate change, soil erosion, poor air quality, & undrinkable water
A. energy conservation
B. human impact
C. sustainability
D. availability
E. natural resources
Grammar › View
I _______ have mentioned the situation if I had known you would be so upset.
A. wouldn’t
B. didn’t
C. won’t