一、单项选择20’
1. They were all asleep. ________ of them heard the sound.
A. Both B. All C. Neither D. None
2. We need trees because they _______ CO2, and let out O2.
A. take in B. take off C. take out D. take away
3. I agree with most of what you said, but I don’t agree with _________ .
A. anything B. something C. nothing D. everything
