火车上，Jane从座位上站起来，对一位刚上来的老爷爷说：“Please sit here, Grandpa.”老爷爷激动地说：

1. A.
   That's very kind of you
2. B.
   Fine, thank you
3. C.
   No, you seat, please
4. D.
   I'm glad to hear that

火车上，Jane从座位上站起来，对一位刚上来的老爷爷说：“Please sit here, Grandpa.”老爷爷激动地说：

[　　]

火车上，Jane从座位上站起来，对一位刚上来的老爷爷说：“Please sit here, Grandpa.”老爷爷激动地说：

[　　]

我到火车站时，火车开走了。

The train had left when I ________ ________ the station.

我到火车站时，火车开走了．（完成句子）

The train had left when I ________ ________ the station.