Do you know Jim quarreled with his wife?—I don’t know._____. [ ]

China’s success in manned-space-craft travel shows _________ out country has become one of the greatest powers in space research.

Is there _______ juice in the glass?—Yes, there is_______.

Do you mind if I________ the TV a bit?－Yes, I do．I’m busy with my composition．

About _____ of the workers in my company ______ to work every day．