So suddenly _____ the disease that the whole family were at a great loss.

A．did he catch

B．he caught

C．was he caught

D．he was caught

2012年12月22日闭幕的中央农村工作会议指出，当前我国现代化建设中最薄弱的环节仍然是         现代化滞后。

A．科学技术

B．服务业

C．国防

D．农业