Don’t always_______your own failure_______others.Sometimes you yourself________.

In a way, Pompeii is like a time capsule ____ a frozen moment in history.

 It is not profitable to provide bus services in districts where the population is widely _____.

In China ______ graduates go abroad to have a further study every year ．

In the early days of radio, those who reported the news were ________ to speak with standard dialects.