题目内容：
16. How did the dog perform his duties?A. He had few opportunities to do them.
B. He was delighted to show them off.
C. He did them quickly to get them over.
D. He did his best but was not often successful.
参考答案：
选择题：16. How did the dog perform his duties?A. He had f
- 题目分类：大学英语第二册
- 题目类型：选择题
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A. He had few opportunities to do them.
B. He was delighted to show them off.
C. He did them quickly to get them over.
D. He did his best but was not often successful.