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(Qualification)Viewed thus, technology-based educational interventions () used to maximize opportunities for international students to exercise learner control and increase the effectiveness of their English learning.

(Qualification)Viewed thus, technology-based educational interventions () used to maximize opportunities for international students to exercise learner control and increase the effectiveness of their English learning.
A.must be
B.can be
C.were
D.are
正确答案:can be