Welcome to ____ (I) room. Look at the photo ____ the wall. You can ____ (see) my parents, my sister and me in the photo. Look! This is my jacket. It is ____ . My hat is blue, too. They ____ (be) on my bed. Oh, can you see the model plane?____ looks very nice . You can see my books ____ pencils are on the desk. ____ is my baseball? It's ____ on the desk. It's under the chair. Do you want to make friends(交朋友) with me? You can call me ____ 689-5265.

为了免受应得的责备，有些人会掩盖真相、敷衍搪塞、编造借口、无中生有、言不对题或者真真假假、闪烁其词。这些欺骗伎俩并非总能奏效，但是其目的却已昭然若揭：不过是想方设法逃避谴责与惩罚罢了。这些欺骗伎俩（   ） 

用棋子摆出下列一组“口”字，按照这种方法摆下去，则摆第N个“口”字需用棋子（      ）．