These are from GMATPrep:

Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil, their descendents, popular known as killer bees had migrated as far north as Southern Texas.
A. Less than 35 years after the release of African honeybees outside Sao Paulo, Brazil,
B. In less than 35 years since releasing African honeybees outside Sao Paulo, Brazil,
C. In less than the 35 years since African honeybees had been released outside Sao Paulo, Brazil,
D. It took less than 35 years from the release of African honeybees outside Sao Paulo, Brazil, when
E. It took less than 35 years after the time that African honeybees were released outside Sao Paulo, Brazil, and then


By 1960, the pilot Rolph held sixteen official international speed records, and he earned them at a time when aviation was still so new for many of the planes he flew to be of dangerously experimental design.

A and he earned them at a time when avation 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 he flew were
C earning these at a time where aviation was still so new that many of the planes he flew were
D earned at a time in which aviation was still so new such that many of the planes he flew were
E earned at a time when aviation was still so new that many of the planes he flew were