Beijing is ______ old and beautiful city. It is _____ capital of China.

The new movie__________to be one of thebiggest money-makers of all time

I called you yesterday, but no one answered.—I ______ my car when you called me.

Wind power is an ancient source of energy ____ we may retum in the near future.[ ]

My MP4 player isn’t in my bag. Where I have put it?