[ Present Perfect Tense and Simple Past Tense ]
The form of the present perfect tense:
A. have/has + past participle
B. had + participle
C. be + verb + -ing
D. have/has + past tense
Select your answer:
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Vocabulary & Grammar › ViewOver the past 10 years, pollution ___________ on the rise in most countries of the world.
A. was
B. has been
C. has been being
D. is
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I ______ open the door last night, the key was stuck in it!
A. couldn’t
B. could
C. can
D. can´t