The U.S. President Barack Obama arrived in China’s economic center Shanghai on Sunday nightof November 15th 2009, ______a state visit to China.[ ]

Your daughter would ______ a famous singer—she has a great gift for music.

To my ________ , the square was so clean after the big meeting.

The children are making . How they are playing!

As we know, language is one of the significant means for mankind to thoughts and feelings.