The course books are _____ by four tapes, which are beneficial to beginners.
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A
adapted
B
designed
C
accompanied
D
managed
推荐题目
---Are you a teacher?      ---No, but I _______.
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A
used to
B
used to being
C
used to be
D
was used to
He was lucky that he escaped _______.
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A
to punish
B
being punished
C
punishing
D
to be punished