I like getting up very early in summer. The morning air is so good .A. to be breathedB. to

问题补充：

I like getting up very early in summer. The morning air is so good .

A. to be breathed

B. to breathe

C. breathing

D. being breathed

答案：

A. to be breathed

(答案→)B. to breathe

C. breathing

D. being breathed

解析：breathe和air之间虽然是动宾关系，但good后省略了for me,其逻辑主语是I，故用动词不定式的主动形式。