Charlie was a rich boy who had more toys than you could imagine. A time came when he was so used to all his toys __________ he began to want something different.
I can never forget the day _______ we worked together and the day ______ we spent together.
I have bought such a watch _______ was advertised on TV.
Last summer we visited the West Lake, ______Hangzhou is famous in the world.
I lost a book, ______I can't remember now.
You're the only person ______I've ever met ______could do it.