____ the rain has stopped, let’s start again.
Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients.
The girl__________ on the ground __________to me that she had___________ the book on the shelf.
--Did Mary come to your birthday party? --No. I __________ her, but she was away on business.
All the preparations_____, we're ready to start.
--Do you know when the Chinese custom_________ from? --It's hard to say. But its characteristics__________ the Tang Period.