[ Vocabulary ]
a scientific test to try out something in order to learn about it
A. eyewitness
B. firsthand
C. theory
D. experiment
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Grammar › View. Which sentence uses a possessive noun correctly?
A. The books cover is torn
B. The book’s cover is torn
C. The books’ cover is torn
D. The book cover’s is torn
Grammar › View
He screamed so loudly that the pigeons pecking (1)_____________ the scattered grains in (2) ___________ courtyard (3) _____________ off in a flurry.
A. On, the, take
B. At, a, takes
C. At, the, took
D. In, some, taking