问题
选择题
____ about the student, the teacher called his parents to find out why he was so absent-minded in class. [ ]
A. Concerned
B. Concerns
C. Concerning
D. Concern
答案
答案：A
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____ about the student, the teacher called his parents to find out why he was so absent-minded in class. [ ]
A. Concerned
B. Concerns
C. Concerning
D. Concern
答案：A