直招士官政审由（）组织。
A.县级征兵办
B.市级征兵办
C.省级征兵办
参考答案：A
It was very kind of you to do the washing up, but you _______ it.
A．mustn't have done
B．wouldn't have done
C．mightn't have done
D．didn't have to do
婴儿口腔保健内容里没有（）
A.哺乳后擦洗口腔
B.进糖后给温开水
C.指套牙刷帮刷牙
D.教孩子刷牙方法
E.补充和强化营养素
