小朋友排队做操，从左向右数丹丹排在第3位，从右向左数丹丹也是排在第3位。一共有几位小朋友在做操呢？
3+3-1=5（位）
.Many of them turned a deaf ear to his advice, __________ they knew it to be valuable.
A．as if
B．now that
C．even though
D．so that
我国的武装力量是由中国人民解放军现役部队、预备役部队、武警部队、公安特警和民兵组成。
