I didn’t see you when I came here last night. Where were you—I my project at home.

With a lot of problem ________, the newly – elected president is having a hard time.

The employee proved ___________ to the job andthe boss praised him.

When we visited my old family home, memory came__________ back.

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。