Writing out all the invitations by hand was more time-consuming than we______.

A．will expect

B．are expecting

C．expect

D．had expected

硬膜外麻醉最严重的并发症是

A．尿潴留

B．血压下降

C．头痛

D．局麻药毒性反应

E．全脊髓麻醉