他竟有脸赖账吗: did he have the nerve to go back on his word
人有脸树有皮: the face is as important to a man as the bark is to a tree
居然: 1.(出乎意料) unexpectedly; to one's surprise 短语和例子居然有这种事 ! who would have thought of such a thing ! 他居然会相信这件事 ! fancy his believing it !2.(甚至于) go so far as to; have the impudence to; have the