The professor suggested that the students ________ into four groups in the experiment.

A. be divided
B. must divided
C. might divided
D. should divided
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科目：初中英語 來源：期末題 題型：單選題

The professor suggested that the students ________ into four groups in the experiment.
[     ]
A. be divided
B. must divided
C. might divided
D. should divided

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