Do you know the____ of the river?
A. depth
B. deep
C. widen
D. wide
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His____is successful .
A. operate
B. operation
C. operating
D. operated
He is one of the ____who support the theory.
A. scientists
B. science
C. scientific
D. sciences
Theteacherwasangryatmy____late.
A. coming
B. come
C. comes
D. came
His____ madethesituationworse.
A. arrival
B. arrived
C. arrives
D. arriving