。

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

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