．The pretty young woman is now experiencing a whole new world that is incredibly awkward _________ there is true love, happiness and care.

No matter what substance it may be, it is ________atom.

对下列各句中“以”字的用法分类正确的一项是（ ）①伏惟圣朝以孝治天下②但以刘日澕西山③谨拜表以闻④生物之息相吹也⑤以八千岁为春⑥臣以供养无主⑦御六气之辩，以游无穷者⑧耕植不足以自给⑨问征夫以前路⑩倚南窗以寄傲

We at the airport; otherwise we would have arrived home by lunch time.

Could it be in the restaurant in ________ you had dinner with meyesterday ________ you left behind your keys and wallet