[ Grammar ]
In 1950, people_________use mobile phones.
A. could
B. couldn’t

Random Topics:
Adverb Of PlaceSentence StructureNouns and QuantifiersSimple Present and Present ContinuousTransportation VocabularyPresent Simple and ContinuousWishesModals for ObligationConjunctions and Sequence ConnectorsGrammar ModalsOther quiz:
Grammar › ViewYour work is _______ (good) than mine.
A. Gooder
B. Better
C. Beter
Grammar › View
Choose the word whose underlined part differs from that of the other three in pronunciation.
A. breadwinner
B. clean
C. team
D. meaning
Modal Verb › ViewJust as my daughter was about to leave the house on her wedding day, my son spilt some tea on her dress. We _______ the stain with some special soap before the wedding took place.
A. were able to remove
B. must have removed
C. might have removing
D. could remove
Phrasal Verbs › View
The plane will take _ in half an hour.
A. of
B. off
C. after
D. over
