【2016真题】18.We mention the importance of giving up smoking once a
2023-12-01插本2008-2016年英语真题（带解析）
【2016真题】18.We mention the importance of giving up smoking once and again, but hardly______it.
A.did they realize
B.have they realized
C.they did realize
D.they have realized
正确答案是B
