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人教版高一英语必修二试卷
第一节：单项填空(共15小题；每小题1分，满分15分)
21. His disappearance(失踪)______ by the police.
A. looked at B. will be looked in C. is being looked into D. has been looked up
22. Her teacher helped her so much that she bought him a beautiful pen _________.
A. by turns B. in return C. in answer D. in turn
