他们把书架固定在墙上，非常稳固。

They fixed the bookshelf ___solidly to the wall.

她工作一向扎实可靠，从未让人失望。

She always works ___solidly and never lets anyone down.

全体员工团结一致地支持新政策。

All the employees stood ___solidly in support of the new policy.