[ Vocabulary ]
Multiple sets of measurements or observations in a scientific investigation.
A. testable
B. data
C. trials
D. control group
Select your answer:
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Articles › ViewWhen we talk about a previously mentioned thing, we use ___.
e.g. Yesterday I bought a new book. ___ book is about the history of Australia.
A. a
B. an
C. the
D. no article
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Let’s play ___ football together!
A. a
B. an
C. the
D. X