____＝____＋____＋____

全球有两百多个国家和地区，语言和文字各异，但是阿拉伯数字却是世界通用的。阿拉伯数字的发明者是（　 　）

读句子，选词填空。

        愿望      失望       希望

我的____是长大了做一名宇航员。爸爸妈妈对此抱有很大的____，我一定不会让他们____的。

    This is my desk. Two____  are on it. One is my English book, and the other (另一本) is my math book. You can also see (也能看见)____CDs  on the desk. The CDs are ____. My pencil box is on the desk,____. A pen,____  eraser and a ruler ____  in it. The pen is black, the____  is yellow, and the ruler is white.  ____  is my pencil? Aha, it's under the desk. Is my computer game  ____the desk，too? No, it isn't. Where is it? I can't____it in my room.