Most people think that it is ________ to spend some time surfing the Internet, but we shouldn't be too dependent on it.

______ to computer games, he had no time to go over his lessons. As a result, he failed in all subjects.

A ______ identification card is required when you purchase foreign money from the Bank of China.

 I can't say which wine is best---it's a(n)_______of personal taste.

 Before the economic crisis came John had sensed the firm was to be ruined and he _____ just in time.