· be on pins and needles坐立不安

　　· have a hollow leg（喝酒）海量

　　· toy with the idea of...心里盘算要……

　　The taxi driver who saved the drowning boy from the river is the salt of the earth.

　　Mary has got a chip on her shoulder about not having obtained the scholarship.

　　He always appears polite and gentle. But his quarrelling with others in dirty words show his true colors.

　　I like to discuss with Helen. She always hits the nail on the head.

　　· Be the talk of the town满城风雨

　　· cool one's heels等的双脚发凉，久等

　　· Hold one’s tongue保持沉默