My friend showed me round the town, ______ was very kind of him. 

________by the beauty of the West Lake, Mary decided to stay for two more days in Hangzhou.

.He suffered from a serious illness last year and I don’t know whether he is_____or dead now.

Edward, you play so well. But I ______ you played the piano. 

Since Shanghai won the right to host the World Expo, over half a million people have volunteered to ___________in all the Shanghai Expo projects .