[单项选择]He had already walked three or four miles ______ he saw a cart, half-full of hay, by the side of the road.
A. while
B. when
C. the moment
D. unless

[单项选择]He had already walked three or four miles ______ he saw a cart, half-full of hay, by the side of the road.
A. while
B. when
C. the moment
D. unless

[单项选择]After the cameraman had taken three or four photographs of the soldier ants, he found they had ______ all over his feet.
A. gathered
B. flocked
C. crowded
D. swarmed

[单项选择]Three hours later he confessed that he had been involved in the attack.（　）
A. reported
B. rejected
C. admitted
D. mentioned

[单项选择]Running slowly for (some) three miles every day (is proved) a good (form) of (exercise).
A. some
B. proves
C. form
D. exercise

[单项选择]

Passage Three
The war had begun, and George had joined the air force. He wanted to be a pilot and after some months he managed to get to the air force training school, where they taught pilots to fly.
There, the first thing that new students had to do was to be taken up in a plane by an experienced pi lot, to give them some ideas what it felt like. Even those who had traveled as passengers in commercial (商业的) airline planes before found it strange to be in the cockpit (驾驶舱)of a small fighter plane, and most of the students felt nervous.
The officer who had to take the students up for their first flight allowed them to fly the plane for a few seconds if they wanted to and if they were not too frightened to try, but he was always ready to take over as soon as the plane started to do dangerous things.
George was one of those who took over the controls of the plane when he went up in it for the first time, and after the officer had taken them fr
A. interesting
B. not nervous
C. different
D. eager to learn