The launch of the first liquid-fuelled rocket in 1926 ______ by flight historians______as significant as the Wright Brothers’ flight.
A. has considered – to be
B. was considered – to be
C. is considered – to be
D. has been considered – has been
Random Topics:
Verbs – Nouns – Adjectives - AdverbsModal Verbs and ConjuctionsPast Perfect Simple TenseVerb Tenses and Subject Verb AgreementPossessive Adjectives and Possessive PronounsTransitional Phrases and ConjunctionsKinds of NounsTypes of Sentence StructurePronouns/ Present TenseRelative - ConditionalOther quiz:
Science › ViewIs a branch of atmospheric science in which the chemistry of the Earth’s atmosphere and that of other planets is studied
A. Climatology
B. Meteorology
C. Atmospheric chemistry
D. Atmospheric physics
Grammar › View
In the sentence “_ car won the race,” which demonstrative pronoun is appropriate for something nearby?
A. This
B. These
C. That
D. Those
Grammar and Vocabulary › ViewZara is much ________ than her sister.
A. friendlier
B. more friendly
C. friendlyer
Prepositions and Adverbs › View
She plans to read a book ________ her classes end.
A. for
B. before
C. after
D. at