I ______ sooner but I didn’t know that they were waiting for me.

下列各句中，加线的成语使用不恰当的一项是（ ）

How does the old man go to the park —He sometimes ____ to the park ____ foot.

I thought she was the very girl that Ishould marry _______ I met her

Where did you go _____vacation, Lana –I went to Guizhou ______my family.