please underline the points (填一介词) which you don't understan

Please don't put your hand ____ the water.oh,I'm sorry.(用介词填 Don't mix 什么these books on the desk please填介词 Don't write__the desk.Whrite___your notebook,please.填介词. please look the blackboard填一介词 Please don\'t change the way you I don't like the way in which / that/ 不填 you speak to your p I don‘t like the way ----you speak to your father 横线处填Which 英语题目：Don’t hide ―the tree.I can see you. “―”填介词 Please you don't help them underline the main points of the letter 翻译下 I realized that it doesn't matter if you don't understan Don't shout ___ the girl 填什么介词,为什么