The Internet is increasingly accessible at school and at home _____many parents and teachers are sometimes not as prepared as we should be to warn children about Internet threats

Some Chinese students find it hard to get used to the life in London.— Exactly, ______ they’ve learnt a lot about the city before.[ ]

Beijing the Great Wall.

John _______ for London this afternoon and his flight _______ off at 18:20

下列各句表达得体的一项是