He left the office,---------.A.were still smiling B.still smiled C.still smiling D.and still smiling要理由

He left the office,---------.A.were still smiling B.still smiled C.still smiling D.and still smiling要理由
He left the office,---------.
A.were still smiling B.still smiled C.still smiling D.and still smiling
要理由

He left the office,---------.A.were still smiling B.still smiled C.still smiling D.and still smiling要理由
C 现在分词组伴随状语
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