You must have waited here for a long time,__________

When you hear Beethoven’s Moonlight Sonata(月光奏鸣曲)，you can feel the softness of the moonlight and the beautiful ________ of the running water.

When the last prize had been awarded _____ everybody cleared off

He is a man of great experience, _____ much can be learned.

Do you know the trouble he had______________ the work