不侵犯中枢神经系统的病毒是（）
A.麻疹病毒
B.脊髓灰质炎病毒
C.乙型脑炎病毒
D.汉坦病毒
E.狂犬病病毒
参考答案：D
— Is this Mr. White’s office, Mary?
— Yes, _____.
A．that’s all right
B．it doesn’t matter
C．after you
D．please yourself
Food supplies may ________ towards the end of the trip, so we can’t waste any food.
A．run out
B．run up
C．run in
D．run away
