阅读理解。 根据下面短文内容，选择合适答案。 George liked flying a plane. Once he bought a small plane and learned how to fly it. He soon became so good that he could make his plane do all kinds of tricks(技巧). George had a friend. His name was Peter. One day George said to his friend. 'Peter，would you like to have a trip in my plane?' Peter thought. 'I've traveled in a big plane several times，but I've never been in a small one, so I'll go.' They went up, and George flew around for half an hour and did all kinds of tricks in the air. When they came down again, Peter was very glad to be back safely , and he said to his friend in a shaking voice(颤抖的声音), 'Well, George，thank you very much for these two trips in your plane. ' George was very surprised and asked, 'Two trips?' 'Yes, my first and my last.'Answered Peter. 1. Peter _____ his friend's plane. A. had to fly in B. was asked to have a trip in C. was asked to fly D. asked George to fly 2. Peter went up with George in the plane because _____ . A. he liked traveling very much B. George was good at flying his plane C. he had never traveled in a small plane D. peter could do all kinds of flying tricks 3. They were in the plane for _____ minutes. A. forty-five B. sixty C. thirty D. some 4. How many times did Peter travel in his friend's small plane? A. Once. B. Twice. C. Three times. D. Several times. 5. From the passage we know that _____ . A. Peter thanked George for the nice trip B. Peter thought it was wonderful to have such a trip C. Peter felt surprised that his friend could fly so well D. Peter was worried about his safety while George doing tricks in the sky