I’m writing to apologize for my absence from last week’s meeting. I was unexpectedly ________ at work.

A．picked up

B．given up

C．held up

D．made up

外交团的活动主要是（）

A.礼仪性活动

B.政治交涉性活动

C.对派遣国与接受国之间的纠纷进行调解

D.对接受国中的各国使馆进行领导和监督