The shop owner suddenly stopped talking with his mouth like a big “O”. It was the President!

President Hu Jintao said economic growth is the basis for strengthening defense capability, which is ____, an important indicator of overall national strength[ ]

What do you think of the film —It’s great. I have seen such a wonderful film before.

She could be with her friend right now______at him.

.Li Yuchun’s song was a______ at once and its recording tape rose to No.1 on the best seller list.