。

take part in    look after    heard of    has been to    enjoy yourself

小题1:Did you ________ ________ on the beach last week？
小题2:We have never ________ ________ the matter before．
小题3:Han Li ________ ________ ________ San Francisco in the USA.
小题4:Sue was very happy to ________ ________ ________ the game.
小题5:It’s difficult for her to ________ ________ the sick boy．