[2013·安徽卷] From space, the earth looks blue. This is ________ about seventyone percent of its surface is covered by water.
Oct.1st, is our National Day, is always celebrated with singing and dancing.
Young people go to college with the expectation that educated people get a higher pay.
With a travelling speed of up to 350 kilometres per hour, the railway to be built between Beijing and Shanghai _______ the journey time from 12 hours to 5 hours.
―Karen, can I talk to you for a minute?―Sure, ________?
-My cat is really fat.-You have given her so much food.