20. His sister left home in 1998, and______since.
_____ its role in social education, the Palace Museum is quitting its admission fee for special groups on certaindates.
--- How messy it is! Kevin, can I come in?--- Oh, I'm so sorry. The house____.
What _ day! My car broke down on the high way and I was late for_____ work.
Without your help, I _____such a breakthrough in this project.
You may not control all the events______happen to you, but you can decide not to be reduced by them.