题目

I was growing tired of helping the numerous people who lost their way and parked in front of my house. Almost every night I was   1  during a good night’s sleep to help someone passing through. Many times I was taken for granted by penniless motorists who did not    2   thank me for the help they received and some even    3   that I didn’t do more. One day, a young man with a-week-old beard    4   out of a broken-down automobile. He had no money and no food. He asked if I could give him some work,   5   him gasoline and a meal. I told him that    6   he设合集U=R，集合A={x|x2+x+1≥0}，B={x|x≥3}，则A∩（CUB）=A.{x|x＜3}B.{x|0＜x≤3}C.{x|x≤0}D.{x|x＞3}