问题描述：
求救!The retired professor,___in his new boo
The retired professor,___in his new book in the past three years ,hasn't realized the decline in his health.A.involved B.being involved C.having involved
I like getting up early in summer.The morning air is so good____.这里为什么填to breath而不是 to be breathed呢?空气不应该是被吸吗?
The retired professor,___in his new book in the past three years ,hasn't realized the decline in his health.A.involved B.being involved C.having involved
I like getting up early in summer.The morning air is so good____.这里为什么填to breath而不是 to be breathed呢?空气不应该是被吸吗?
问题解答：
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