问题
选择题
21. He apologized ________ late.
A．to his teacher to arrive
B．to his teacher for arriving
C．at his teacher to arrive
D．at his teacher for arriving
答案
答案：B
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21. He apologized ________ late.
A．to his teacher to arrive
B．to his teacher for arriving
C．at his teacher to arrive
D．at his teacher for arriving
答案：B