[ Vocabulary ]
The ______ of the plane’s engine puts many passengers to sleep.
A. loom
B. animated
C. drone
D. upright

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Grammar › ViewThe exhibit in the lobby of our building gives visitors __________ of the firm’s 100-year history.
A. outline
B. a outline
C. an outline
D. an outlining
Grammar › View
He is an alumnus/alumni of our university and visits every year
A. alumni
B. alumnus