题目：
选择题
He is a controversial person, but his science fiction books are ＿＿＿＿＿＿＿.
- A. admired by both his friends and opponents
- B. admired by his friends, also by his opponents
- C. admired both by his friends and his opponents
- D. both admired by his friends and his opponents
答案：
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