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The correct answer is D. none of which 1. She had so much luggage that there was not enough room in the car for it. 2. There are so many planets in the universe that we cannot count them. 3. Hundreds of years ago, there were many villages and little towns in England. 4. Almost all medical doctors have had some training in psychology and psychiatry. 5. Good scientists always cooperate with each other no matter what their nationalities are. 6. Tom said that if he had to do another piece of homework tonight, he would not be able to attend the concert. 7. In Canada many people speak English because they also came from England many years ago. 8. We didn't have much knowledge about physics. 9. Neither of the scout leaders knows how to trap wild animals or how to prepare them for mounting. 10. The Earth is the only planet with a large amount of oxygen in its atmosphere.