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

Random Topics:
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:
Grammar › Viewwhich is plural for car
A. carvies
B. cares
C. cras
D. cars
Vocabulary › View
What type of weather is it?
A. summer
B. fog
C. rain
D. heat wave
Choose the correct modal: They ___ be at the meeting by 10 AM. (must/can’t)
A. might
B. should
C. could
D. must
Future Tenses › View
I think I ___ a cassette recorder and use it in class.
A. buy
B. am buying
C. will buy
D. would buy
