题目:
By 1940, the pilot Jacqueline Cochran held seventeen official national and international speed records, and she earned them at a time when aviation was still so new for many of the planes she flew to be of dangerously experimental design.
选项:
A、and she earned them at a time when aviation was still so new for many of the planes she flew to be
B、earning them at a time that aviation was still so new for many of the planes she flew to be
C、earning these at a time where aviation was still so new that many of the planes she flew were
D、earned at a time in which aviation was still so new such that many of the planes she flew were
E、earned at a time when aviation was still so new that many of the planes she flew were
答案:
E