Yes. Wash your hands with soap at the end of your experiment.
可以。在实验结束时要用肥皂洗手。
Ask Mr. Wu if you can have some old boxes.
问问吴先生,你能否搞到一些旧箱子。
On our way home that night I looked down and saw that the necklace was not around my neck any more. I told Pierre. We rushed back to the palace and looked for it.We asked everyone there if they had found a necklace, but without luck. We couldn't find it;