任意剪一些完全相同的四边形，进行平面镶嵌，并试着画出所得到的图案。
解：“略”。
I think that this meal was well worth _____ was charged for it. [ ]
A. that
B. what
C. which
D. how many
在大纲窗格中输入文本后在同一级下换行用（）。
A.CTRL+ENTER
B.ALT+ENTER
C.SHIFT+ENTER
D.ENTER
