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The teachers are doing what they _____ their students.

A. can to teach
B. can teach
C. can teaching
D. can to teaching
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科目:初中英語 來源:0103 期中題 題型:單選題

The teachers are doing what they _____ their students.
[     ]
A. can to teach
B. can teach
C. can teaching
D. can to teaching

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