With so many forms ___, many students feel at a loss before the 2012 college entrance exam.[ ]

Living in a fast-paced world, we get left behind if we stop learning.

How many times have you the Science Museum

When it is winter in China, it is _______in Australia.

Is there any possibility ________ wecan get a ticket for The 2010 Shanghai World Expo — Of course, yes.You can either go to the Expo in person or buy ________ through the Internet.