根据句意及所给首字母提示完成句子。

1. —What w _____ you do if you wanted to make friends with a new student?

    —I'd introduce myself.

2. This cake looks d _____ from that one.

3. Don't be w_____ about me. I'm feeling better now.

4. If I w _____ a millionaire, I'd send money to "Animal  Helpers " .

5. I hear that you have won m _____ of dollars.

测定建筑物的平面位置随时间而移动的工作叫（）。

A.挠度观测

B.裂缝观测

C.沉降观测

D.水平位移观测