He is very old, he still works very hard.A. butB. ifC. whenD. as

发布时间：2020-08-16 07:59:06

He is very old,     he still works very hard.    
A. but
B. if
C. when
D. as

网友回答

(答案→)A. but
B. if
C. when
D. as
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