Mary has caught a bad cold.—Has she I regret_________her to put on more clothes yesterday.

It is ______ that he has been addicted to the drugs and has difficulty quitting it. [ ]

依次填入下面文字中横线处的词语，最恰当的一组是①《红楼梦》这部中国古典文学的巅峰之作，经曹雪芹 ，“披阅十载，增删五次”，才完成了前八十回。②河西走廊曾是佛教东传的要道，这里还留存着大量的石窟群，大小石窟 ，东西方文化在这里相互激荡，积淀下蔚为壮观的历史文明。③要想让“公务员热”真正实现降温，不是 的事，关键还是要看能不能实现对权力的有效制约，能不能真正赋权于民还权于民。

29th, 2015, China further relaxed its more than three-decade-old family planning policy to allow all couples to have a second child and the new law ______ officially on Jan 1st, 2016.

Do you know how I can ____ him?—On his mobile phone．