______in a long queue, we waited for the store to open to buy a New iPad. [ ]

Would you mind ______ my pet dog I will be away for about a week. – Of course not.

_______ supplying news from all over the world, newspapers give us a lot of other useful information

It’s believed that our moods are sometimes by colours. Many scientists are doing some research (研究) on this subject.

The car was stopped by highway man, while ______ through a forest.