I have never visited the Great Wall before。.—___ _________

The warm-hearted neighbor take care of the little girl when her parents were on business, and they appreciated it very much.

_______ in the book, he didn’t notice mycoming.

依次填入下列横线处的词语，最恰当的一组是( )办公人员的座椅高度是非常有讲究的。专家　　　，许多人办公座椅的高度都存在一定问题，久坐会　　　疲劳感，并出现腰酸背痛的毛病。正确的做法是:首先根据工作性质把办公桌调整到一个　　　的高度，然后再依据自身情况来调整座椅的高度。

The movie star didn’t ________ until the crazy fans had waited for almost two hours.