To save time on the Internet,______. A: some people leave their letters in the dustbin B: some people never use "shift" in their writing C: people seldom use capital letters and punctuation D: many people leave the capital or punctuation

—Don’t put the waste on the ground, young man. —Oh, I’m sorry. I ______ the dustbin there. A: hadn’t seen B: didn’t see C: can’t see D: wasn’t seeing