Tony and I are good friends. We tried to walk across the United States of America. We're not exactly sure 　1.　 we were doing it. Part of it was to test ourselves; to see if we could face the challenges. When I was 　2.　 teenager I often daydreamed that I was going to walk across the United States 　3.　I graduated from high school. 　 4.　，I didn't do that. Before I knew it I was in my thirties, married, 　 5.　 (have) a job, yet still had this idea in my mind with each　6.　(pass) year. I figured I was too old and my opportunity had passed. Then, a few years ago，I met Tony,　 7.　 was in his thirties and quit his job as a civil engineer in New York City to walk across the United States. He wasn't doing it for a cause　8.　 as part of an organization. He was doing it　9.　（simple) because he loved to walk and discover. The idea was back and I no longer had an excuse. We planned on averaging 20 miles a day and taking some days off to rest, so we expected the walk to. take about 6 months realizing it could take　10.　（long). We were in no hurry: The total distance would have been about 3,100 miles.

— He was nearly killed by a car once.

 　 — When was____?

 　 — ____ was in 2000 ____ he was in a middle school.

 　 A. that; It; when　 B. that; It; that　 　 C. this; That;that D. this; It; when

—He was nearly drowned once.?

—When was 　　　??

—　　 was in 1998 when he was in middle school.?

A.that;It　　　　 B.this;This?

C.this;It　　　　 D.that;This

—He got his first book published.It turned out to be a best-seller.?

—When was　 ??

—　　 was in 2000 when he was still in college.?

A.that;This　　　　　　 B.this;It?　　　　　　 C.it;This　　　　　 D.that;It