30. Even if you are an experienced teacher, you sometimes make some mistakes.A. canB. mus

发布时间：2020-08-16 06:57:02


30. Even if you are an experienced teacher, you sometimes      make some mistakes.
A. can
B. must
C. should
D. Will

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(答案→)A. can
B. must
C. should
D. Will
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