the students are l_____ to their teachers

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thestudentsarel_____totheirteachersthestudentsarel_____totheirteachersthestudentsarel_____totheirtea

the students are l_____ to their teachers
the students are l_____ to their teachers

the students are l_____ to their teachers
listening 因为listen后加to,且are后加动词-ing.

listening

listening

listening