单项选择题
"Sorry I forgot to post the letter for you."" (). I'll post it myself tonight."
A. Never mind B. No matter C. That's good D. Not care
单项选择题 It is essential that people () enough vitamins every day.
单项选择题 (), wild dogs have very keen(灵敏的)senses of sight, hearing, and smell.
单项选择题 I knew I could not finish my homework()
