根据对话内容，在句子空格处填上适当的单词。

Lily: Where is my toy bear? I can not (1)f            it.

Tim: Do not (2)w           . Let me (3)h            you. Is it in the (4)d           ?

Lily: No, it is not.

Tim: What is in the (5)b           ? Is it your (6)t           ?

Lily: Oh, no! (7)H           !It is a mouse (老鼠). I feel (8)s            .

Tim: Take is easy (别紧张). Let me have a (9)l            at it. Oh, it is only a dead (死的) mouse.

        Are you (10)o           ?

Lily: Yes, I feel much better (好多了).

在进行水准测量前，即抄平前要将水准仪安置在适当位置，一般选在观测两点的其中一点附近，并没有遮挡视线的障碍物。