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。

Sally, I went to the concert last night. How big the hall is!—So it is. It is to hold more than one thousand people.

I play ______basketball every day.

When Nanjing Metro Line 3 came into use, it became much to travel from the north of the Changjiang River to the city centre.

I think it a little __________ to finish so much work within 30 minutes.