新概念2练习册答案,38课,这里有图,

When the phone rang,I just closed and locked the front door.
Mary didn't ring me until she read my letter.
As soon as Ipaid my bills,I had to go out and earn some more money.
He had played the trumper for ten years before he got a job in a band.
The criminal had no sooner returned to the country then the police arrested him.