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
Random Topics:
Prepositions of TimeGerund or to InfinitiveVocabularyPresent Perfect and Past Simpleanother/the others/each other/one anotherTenses & AffixesVerbal PhrasesPassivisationComplex SentencesParts of Speech and GrammarOther quiz:
Quantifiers › ViewThe government has done _____________ or nothing to help the poorest people in this country.
A. few
B. a few
C. little
D. a little
Present Simple Tense › View
I always (do)……….my homework after school.
A. do
B. does
C. not do
D. not does
Conjunctions › ViewThis is the man ____________ had a car accident yesterday.
A. where
B. who
C. and
D. then
Past Simple & Past Continuous › View
This morning I saw Judy while she ______ her bike around the lake and ______ photos of some of the rarest birds in the world.
A. was riding/was taking
B. rode/took
C. was riding/took
D. rode/was taking