D

　　During World War II， Polish pilots in Great Britain were famous for showing off their flying skills. One morning， I was returning from a flight test and made the mistake of beginning my land approach （降落） at too low a speed. Just as I crossed the airfield， something was wrong with my plane and it dropped from 2000 feet onto the landing trip and bounced back （彈起） into the air.

　　I gave it full speed， but the plane leaned onto its left wing， and I was off the runway. In despair， I cut all power and used full right brake （制動閘）。 The plane turned 180 degrees back onto the landing trip， tail first. The firm P51 was not damaged. “Did you see that plane？” a visiting air official said breathlessly.

　　“Don‘t worry， sir，” the Air Force commanding officer replied， “it’s only one of those Polish pilots trying to show off”。

　　68. The writer of the story was _____.

　　A. a Polish pilot

　　B. an English official

　　C. a visitor

　　D. an officer

　　69. The pilot who flew the plane _____.

　　A. was showing off his flying skills

　　B. had great difficulty in landing the plane

　　C. repaired the plane before landing

　　D. landed on the airfield without difficulty

　　70. The plane bounced back into the air because _____.

　　A. the pilot began his landing approach too late

　　B. the pilot suddenly decided not to land

　　C. something was wrong with the left wing

　　D. it was out of control