I hurried to the accident spot only to find two dogs happily enjoyed what was left ____the cake and meat

I haven’t heard from Bill ______he left here.

The international agreement, __________to help people kick off the habit of smoking, was signed two years ago.

(2014·辽宁五校第一联合体考试)What impresses me most is________he appears in front of others，he wears a sincere and charming smile

Harsh ________ his words may be, they will do us a lot of good[ ]