[ Grammar ]
_____ the use of cigarettes on an aircraft should have been done long ago.
A. Ban
B. bans
C. banned
D. banning

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Understanding Product Packaging and TensesVocabularyAdjective or AdverbAdjective ClauseUnscramble SentencePast Perfect or Past Perfect ContinuousTenses and ArticlePresent Perfect Simple & Present Perfect ContinuousSimple Compound and Complex SentencesSimple present/ past/ future tenseOther quiz:
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A. The cat sleeps all day.
B. The cat is sleep now.
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The opposite of lazy is:
A. hard-working
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A. might
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I think I ___ a cassette recorder and use it in class.
A. buy
B. am buying
C. will buy
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