—Hi, Bruce. Here is a letter for you.

—Thanks. I wonder          .

A. who the letter was from                 B. who was from the letter

C. who was the letter from                 D. who from the letter was

—Hi, Bruce. Here is a letter for you.

—Thanks. I wonder          .

A. who the letter was from          B. who was from the letter

C. who was the letter from          D. who from the letter was

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Ron, the teacher at the skydiving（跳傘運(yùn)動） school, was surprised when the gray-haired man said that his name was Walter and asked if he could take skydiving lessons. Ron asked him how old he was and he （1） r                 that he was 60. Ron explained to Walter that （2） a                over 50 had to be checked by a doctor before he could learn to jump from a plane. “I’m sorry, but I can’t let you start learning （3） w                a letter from your doctor.”

Walter smiled. “Here is a letter from my doctor. He asked me to take （4） l           of tests and he says that I’m fine.”

So Walter was able to join the skydiving school. He came to all the lessons and worked very （5） h               . Soon it was the time for him to make his （6） f          jump. Ron asked him if he was feeling OK. Walter answered that he had never felt better. However, he added that there was something he should have told Ron （7） e               . Ron asked what it was and Walter smiled. Then just before he jumped, he told Ron that he wasn’t 60. Ron asked how old Walter （8） r                   was and Walter told him he was 75!

Walter has a lot of （9） h                . He enjoys riding fast motorbikes and （10）

c             mountains. Last year he was saved by a police helicopter（直升飛機(jī)） in Wales.

His daughter Betty worries about him. “I think he should stop all these activities. But my mother says that as long as he’s happy, it’s OK.”