As he was setting out that afternoon,there was only__one___thing to do.
As he was setting out that afternoon,there was only__one___thing to do.
那天下午当他出发的时候,只有一件事情要做.
As he was setting out that afternoon,there was only__one___thing to do.
那天下午当他出发的时候,只有一件事情要做.