[ Subject Verb Agreement ]
Two-thirds of water _____ polluted.
A. is
B. are
C. being
D. been
Select your answer:
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Quantifiers & Modals of Obligation › ViewThe doctor has put me on a strict diet. I _ _ _ _ _ eat more fruit and vegetables and do more exercise.
A. must
B. have to
C. ‘ve to
Vocabulary › View
working to discover something
A. detecting
B. detecting
C. vary
D. unobserved