[ Tenses ]
Much progress ________in telecommunications during World War I, but the basic technique________in the previous decades.
A. was achieved – had been developed
B. has been achieved – were developed
C. had been achieved – has been developed
D. would have been achieved – were developing
Select your answer:
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Sentence TypesModals of Necessity and SuggestionPerfect ModalsSynonyms and VocabularyPresent Simple and Present Continuous TensesGerunds, Infinitives and ParticiplesPronouns of QuantityFuture Continuous, Future Perfect and Future Perfect ContinuousComparatives and Past Perfect TenseAdjectives, Adverbs, and PrepositionsOther quiz:
Present Perfect vs Past Simple Tense › ViewThere ___ thousands of soldiers in the battle and they all ___ bravely.
A. was / fighted
B. were / fought
C. was / fought
D. were / fight
E. were / fighting
Grammar › View
Hew Chin currently has ________________ very impressive stamp collection.
A. –
B.a
C. an
D. the