______his arrival, he began to make preparations for the speech of the conference.
A.In
B.With
C.On
D.By
网友回答
C解析"他一到达就开始为会议演讲做准备"
一...就的表达法：介词on/upon
连词 as soon as/ the moment/ directly/ immediately
以及hardly...when/ no sooner...than
句子还可写成Upon his arrival, he began to make preparations for the speech of the conference.
As soon as he arrived , he began to make preparations for the speech of the conference