--- You have made a promise to go with me to Nanjing. So why aren’t you getting ready?

--- But I ________ that you wanted me to start at once.

A．haven’t realized

B．hadn’t realized

C．didn’t realize

D．don’t realize

有关妊娠的诊断哪项最准确

A．停经史

B．早孕反应

C．子宫增大

D．超声多普勒证明有胎心

E．自觉胎动