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.
. The World Wide Web is sometimes jokingly called the World Wide Wait because it ______ be very slow.
Many young people in the West are expected to leave ______ could be life's most important decision --- marriage --- almost entirely up to luck.
We missed our train, and ___ the next train was delayed, ____ we had to wait for two hours.
Not only ______ interested in football but ______ beginning to care about it.
From this story, you can have some idea ______ can be used in reality.