To study the ultrafast movements of atoms, chemist Ahmed Zewail had to devise a novel spectroscopy technique capable of measuring chemical reactions within molecules at a quadrillionth of a second. Ultimately, Zewail succeeded and was eventually honored with the Robert A. Welch Award and the Albert Einstein World Award of Science for this groundbreaking achievement.
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Verbal·Standard English Conventions·Form, Structure, and Sense
mediumWhich choice completes the text so that it conforms to the conventions of Standard English?
A
occurred
B
occurring
C
occur
D
will occur