[ Grammar ]
Acid rain can be caused due to combustion of fossil fuels or erupting volcanoes or rotting vegetation which ____ sulfur dioxide and nitrogen oxides into the atmosphere.
A. release
B. releases
C. is releasing
D. have released
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Past Perfect and Past Perfect Continuous TenseAdverbs of Manner, Likes and PreferencesModals and PhrasesGrammar - First ConditionalTime and CalendarPassive Voice - Present Simple and Past SimpleTo Infinitive/Bare Infinitive/GerundsApologizingClauses of ReasonRelative Pronouns with PrepositionsOther quiz:
Conditional and Mix Conditional Sentence › ViewI and my fiance would have got married in Februari if ….
A. his parents have been in Indonesia
B. his parents are in Indonesia
C. his parents had been in Indonesia
D. his parents were in Indonesia
Miscellaneous Grammar Usages › View
He likes his new job very much and
A. works hardly
B. hard works
C. hardly work
D. works hard
Can vs be able to › ViewMary __________ sing. She’s part of the school band.
A. is able to
B. was able to
C. can
Grammar & Vocabulary › View
Choose the Correct Sentence
A. Listen! The birds sing outside.
B. Listen! The birds are singing outside.