[ Grammar ]
Scientists now know that the lack of an embryonic thumb in birds is why ____ almost impossible for birds and dinosaurs to be related.
A. is
B. it is
C. is it
D. it
Select your answer:
Random Topics:
Coordinate Conjunction Parts of SpeechSit vs. SetGrammarPresent Continuous Tensea, an, the, zero articleWish SentenceSecond ConditionalDefinite pronouns (Subject, Object, Reflexive)
Other quiz:
Vocabulary › ViewAppearing or happening again from time to time
A. Update
B. Recurrent
C. Chide
D. Thwart
Comparision › View
He drives _______________ his brother. (carefully)
A. more carefullier
B. more carefully than
C. more carefully
D. carefullier than
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