请将带开关的螺丝口灯泡和三孔插座正确接入图所示的电路中。
Betty often falls ill these days. Her father asks her _____ with him. [ ]
A. do sports
B. to do sports
C. doing sports
D. does sports
羊水过少为单一羊水暗区垂直深度小于（）。
A.3cm
B.7cm
C.8cm
D.20cm
E.10cm
