(2013·河北三校联合模拟)I didn't want to drive all the way to New York by myself，so I ________ Anna，my best friend of ten years，to ride with me.

Liu Xiang found himself      by reporters and his fans on his arrival at the airport.

 Though you've got a tight schedule these days, I should be ________ if you could spare time to attend our meeting today.

The population of this city ,forty percent of which_____, ______ 15% in the last three years

Teachers have to constantly update their knowledge in order to maintain their professional _____.