Beijing is _______ beautiful city. It’s _______ capital of China.

His legs and arms were tied ____the ground and he can’t move________.

Online shopping is increasingly popular；by September 2011，the total daily sales at Taobao______ had amounted to 935 million yuan，which had even overtaken the daily total sales of Hong Kong

It’s so brave ______ the soldier to save the boy’s life.

In the reading-room, we found Winifred ____at a desk,with her attention _____on a novel．