It was on a train _____ I was travlling to Xi’an _____ I made the acquaintance of the old professor from UK.

In order to finish the task on time , we can’tto waste a single minute.

More teens are smoking in Beijing, ______ the number of primary and middle school students picking up the habit has more than doubled from previous years.

.Each man and woman ______ the same rights.

They said they would have ____________ holiday.