[ Grammar ]
It ______ (happen) every year.
A. is happening
B. is happens
C. happens

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Grammar › ViewI am ready for a break.
What voice does the verb use?
_
A. Active
B. Passive
C. Stative
Tenses › View
Which of the following sentences is an example of the present continuous tense?
A. We come here every week.
B. He lives in America.
C. It is raining at the moment.
D. I think he’s lazy.
Vocabulary › Viewsingle source of air pollution
A. point source
B. nonpoint source
C. ozone
D. conservation
Grammar › View
We stopped at the petrol station ……..some water.
A. to buy
B. buying
C. to bought
D. to buying
