[ Grammar ]
Today, many serious childhood diseases ……………….. by early immunization.
A. are preventing
B. can prevent
C. prevent
D. can be prevented
Select your answer:
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Vocabulary › Viewmake certain of
A. transition
B. hypocrite
C. spry
D. ensure
Grammar › View
Although the instructions were clear, many users found the interface difficult to ____.
A. navigates
B. navigation
C. navigate
D. navigated