"Bad habits,______formed,are difficult to give up."

"Bad habits,______formed,are difficult to give up."
A.and
B.once
C.or
D.but
翻身也是咸鱼 1年前 已收到1个回答 举报

snelili 幼苗

共回答了23个问题采纳率:82.6% 举报

"答案B
once formed =once it is formed; once表示""一旦."".

1年前

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