阅读下面材料，在空白处填入适当的内容（不多于3个词）或括号内单词的正确形式.

    This Christmas, maybe different from previous years, a strong desire drives me to make my own Christmas gifts. ____ (honest) speaking, I've promised myself this more than once. As ____ crafter (工匠), I've frequently thought I am ____ (suppose) to turn it into action. However, this year I really plan to stick ____ it. It's partly because I am short ____ money. More importantly, recently I ____ (return) from an inspiring trip around Britain, collecting some information about crafting for BBC's Newsnight.

    I was really struck by people's increasing ____ (enthusiastic) for making things. When I asked some people ____ they could sew(缝纫), only a few raised their hands. ____ when I asked who wanted to learn, nearly everyone responded positively, ____ (hope) to learn something practical.

设椭圆E： $\frac{x^2}{a^2}$ + $\frac{y^2}{8-a^2}$ =1（a＞0）的焦点在x轴上．

（Ⅰ）若椭圆E的离心率e= $\frac{\sqrt{2}}{5}$ a，求椭圆E的方程；

（Ⅱ）设F₁、F₂分别是椭圆E的左、右焦点，P为直线x+y=2 $\sqrt{2}$ 与椭圆E的一个公共点，直线F₂P交y轴于点Q，连结F₁P，问当a变化时， $\overrightarrow{F_{1}P}$ 与 $\overrightarrow{F_{1}Q}$ 的夹角是否为定值，若是定值，求出该定值，若不是定值，说明理由．

让钢琴和手风琴都发出C调的“do”，我们能区分开是钢琴还是手风琴的声音，这是依据             （   ）

 It is____. It is____.

人民政协是大团结大联合的象征，是密切海内外同胞关系的桥梁和纽带。这表明人民政协是（    ）