Mary, you can’t imagine what great difficulty I’ve had _____ him with the project.
.The young often___the old in our town.
._____a wonderful sense of humour.
I don’t like talking on__telephone;I prefer writing__letters.
In the time of social reform, people’s state of mind tends to keep with the rapid change of society.
When I saw mum nod _______ to me, I calmed down and went on with my acting.