[ Grammar ]
There are strict rules against students ____ their mobile phones at the school premises.
A. are using
B. using
C. want to use
D. having used

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Modal AuxiliariesHow much and how manyAdverb of Frequency and TensesHabitual and Continuous TensesVocabulary, Adjective & PrepositionAdverbial Concession ClausesGrammar & VocabConditional Sentences and Verb FormPast Perfect Simple & Past Perfect ContinuousGerunds + To InfinitiveOther quiz:
Grammar › ViewMs. Carlson said she had quickly administered first ______.
A. aide
B. aid
Grammar › View
John often says he_________boxing because it_________a cruel sport.
A. doesn’t like – is
B. did not like – were
C. not liked – had been
D. had not liked – was
Sentence Structure › ViewDominique loves hiking in the mountains, ___ she is moving to Colorado.
A. so
B. and
C. yet
D. for
Vocabulary › View
What is the inner layer of the Sun’s atompshere, located above the photosphere and below the corona?
A. Corona
B. Photosphere
C. Chromosphere
D. Blazar
