Mrs. Smith locked both the front and the back doors before she went to bed______thatsomeone might steal into the house at night.
A、so
B、forfear
C、unless
D、oncondition
A、子宫收缩极性倒置
B、痉挛性狭窄环紧箍胎体
C、宫缩具有节律性、极性和对称性
D、宫缩的兴奋点来自子宫下段的一处或多处
小儿腹泻出现低渗性脱水，静脉补充累积损失量时应补充（）
A、1/5张含钠液
B、1/3张含钠液
C、1/2张含钠液
D、2/3张含钠液
My wallet is nowhere to be found.I_____it when I was on the bus.
A、mustdrop
B、shouldhavedropped
C、haddropped
D、musthavedropped