单项选择题

He looked at the train moving out of the station ______ it had disappeared.

A. when
B. until
C. after
D. since
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______ the 1500’s ______ the first European explored the coast of California.
A. It was until ... then
B. It was not until ... when
C. it is until ... that

D. It was not until ... that
单项选择题
______ he wanted to see was an end to all the armies of the world.
A. What
B. It
C. Which
D. That
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