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.
—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
Once harm is _______ to the eco-system, all species will ________, including man himself.
The stamp on the letter is an art, from _______ we can get a lot of cultural knowledge.
It is believed that a new kind of drug ______ by the scientists and they are hopeful that they will succeed in a few months.
Jenny nearly missed the flight ________ doing too much shopping.