By the time I ____________, I realized that I had left my umbrella in the shop.

A．arrived at home

B．reach home

C．got to home

D．arrived home

我国现存最早的产科专书是：

A．《经效产宝》
B．《十产论》
C．《女科撮要》
D．《胎产书》
E．《达生编》